513 lines
17 KiB
Plaintext
513 lines
17 KiB
Plaintext
dnl See whether we need a declaration for a function.
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dnl The result is highly dependent on the INCLUDES passed in, so make sure
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dnl to use a different cache variable name in this macro if it is invoked
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dnl in a different context somewhere else.
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dnl gcc_AC_CHECK_DECL(SYMBOL,
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dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, INCLUDES]]])
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AC_DEFUN([gcc_AC_CHECK_DECL],
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[AC_MSG_CHECKING([whether $1 is declared])
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AC_CACHE_VAL(gcc_cv_have_decl_$1,
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$4],
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[#ifndef $1
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char *(*pfn) = (char *(*)) $1 ;
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#endif])], eval "gcc_cv_have_decl_$1=yes", eval "gcc_cv_have_decl_$1=no")])
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if eval "test \"`echo '$gcc_cv_have_decl_'$1`\" = yes"; then
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AC_MSG_RESULT(yes) ; ifelse([$2], , :, [$2])
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else
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AC_MSG_RESULT(no) ; ifelse([$3], , :, [$3])
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fi
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])dnl
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dnl Check multiple functions to see whether each needs a declaration.
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dnl Arrange to define HAVE_DECL_<FUNCTION> to 0 or 1 as appropriate.
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dnl gcc_AC_CHECK_DECLS(SYMBOLS,
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dnl [ACTION-IF-NEEDED [, ACTION-IF-NOT-NEEDED [, INCLUDES]]])
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AC_DEFUN([gcc_AC_CHECK_DECLS],
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[AC_FOREACH([gcc_AC_Func], [$1],
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[AH_TEMPLATE(AS_TR_CPP(HAVE_DECL_[]gcc_AC_Func),
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[Define to 1 if we found a declaration for ']gcc_AC_Func[', otherwise
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define to 0.])])dnl
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for ac_func in $1
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do
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ac_tr_decl=AS_TR_CPP([HAVE_DECL_$ac_func])
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gcc_AC_CHECK_DECL($ac_func,
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[AC_DEFINE_UNQUOTED($ac_tr_decl, 1) $2],
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[AC_DEFINE_UNQUOTED($ac_tr_decl, 0) $3],
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dnl It is possible that the include files passed in here are local headers
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dnl which supply a backup declaration for the relevant prototype based on
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dnl the definition of (or lack of) the HAVE_DECL_ macro. If so, this test
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dnl will always return success. E.g. see libiberty.h's handling of
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dnl `basename'. To avoid this, we define the relevant HAVE_DECL_ macro to
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dnl 1 so that any local headers used do not provide their own prototype
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dnl during this test.
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#undef $ac_tr_decl
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#define $ac_tr_decl 1
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$4
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)
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done
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])
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dnl 'make compare' can be significantly faster, if cmp itself can
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dnl skip bytes instead of using tail. The test being performed is
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dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
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dnl but we need to sink errors and handle broken shells. We also test
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dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
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dnl accepted by cmp on some systems.
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AC_DEFUN([gcc_AC_PROG_CMP_IGNORE_INITIAL],
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[AC_CACHE_CHECK([for cmp's capabilities], gcc_cv_prog_cmp_skip,
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[ echo abfoo >t1
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echo cdfoo >t2
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gcc_cv_prog_cmp_skip=slowcompare
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if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then
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if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then
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:
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else
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gcc_cv_prog_cmp_skip=gnucompare
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fi
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fi
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if test $gcc_cv_prog_cmp_skip = slowcompare ; then
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if cmp t1 t2 2 2 > /dev/null 2>&1; then
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if cmp t1 t2 1 1 > /dev/null 2>&1; then
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:
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else
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gcc_cv_prog_cmp_skip=fastcompare
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fi
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fi
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fi
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rm t1 t2
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])
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make_compare_target=$gcc_cv_prog_cmp_skip
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AC_SUBST(make_compare_target)
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])
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dnl See if symbolic links work and if not, try to substitute either hard links or simple copy.
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AC_DEFUN([gcc_AC_PROG_LN_S],
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[AC_MSG_CHECKING(whether ln -s works)
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AC_CACHE_VAL(gcc_cv_prog_LN_S,
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[rm -f conftestdata_t
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echo >conftestdata_f
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if ln -s conftestdata_f conftestdata_t 2>/dev/null
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then
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gcc_cv_prog_LN_S="ln -s"
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else
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if ln conftestdata_f conftestdata_t 2>/dev/null
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then
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gcc_cv_prog_LN_S=ln
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else
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if cp -p conftestdata_f conftestdata_t 2>/dev/null
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then
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gcc_cv_prog_LN_S="cp -p"
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else
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gcc_cv_prog_LN_S=cp
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fi
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fi
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fi
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rm -f conftestdata_f conftestdata_t
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])dnl
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LN_S="$gcc_cv_prog_LN_S"
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if test "$gcc_cv_prog_LN_S" = "ln -s"; then
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AC_MSG_RESULT(yes)
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else
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if test "$gcc_cv_prog_LN_S" = "ln"; then
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AC_MSG_RESULT([no, using ln])
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else
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AC_MSG_RESULT([no, and neither does ln, so using $gcc_cv_prog_LN_S])
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fi
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fi
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AC_SUBST(LN_S)dnl
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])
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dnl Define MKDIR_TAKES_ONE_ARG if mkdir accepts only one argument instead
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dnl of the usual 2.
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AC_DEFUN([gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG],
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[AC_CACHE_CHECK([if mkdir takes one argument], gcc_cv_mkdir_takes_one_arg,
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
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#include <sys/types.h>
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_DIRECT_H
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# include <direct.h>
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#endif], [mkdir ("foo", 0);])],
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gcc_cv_mkdir_takes_one_arg=no, gcc_cv_mkdir_takes_one_arg=yes)])
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if test $gcc_cv_mkdir_takes_one_arg = yes ; then
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AC_DEFINE(MKDIR_TAKES_ONE_ARG, 1, [Define if host mkdir takes a single argument.])
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fi
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])
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AC_DEFUN([gcc_AC_PROG_INSTALL],
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[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
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# Find a good install program. We prefer a C program (faster),
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# so one script is as good as another. But avoid the broken or
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# incompatible versions:
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# SysV /etc/install, /usr/sbin/install
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# SunOS /usr/etc/install
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# IRIX /sbin/install
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# AIX /bin/install
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# AFS /usr/afsws/bin/install, which mishandles nonexistent args
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# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
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# ./install, which can be erroneously created by make from ./install.sh.
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AC_MSG_CHECKING(for a BSD compatible install)
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if test -z "$INSTALL"; then
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AC_CACHE_VAL(ac_cv_path_install,
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[ IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="${IFS}:"
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for ac_dir in $PATH; do
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# Account for people who put trailing slashes in PATH elements.
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case "$ac_dir/" in
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/|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
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*)
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# OSF1 and SCO ODT 3.0 have their own names for install.
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for ac_prog in ginstall scoinst install; do
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if test -f $ac_dir/$ac_prog; then
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if test $ac_prog = install &&
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grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
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# AIX install. It has an incompatible calling convention.
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# OSF/1 installbsd also uses dspmsg, but is usable.
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:
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else
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ac_cv_path_install="$ac_dir/$ac_prog -c"
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break 2
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fi
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fi
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done
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;;
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esac
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done
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IFS="$ac_save_IFS"
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])dnl
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if test "${ac_cv_path_install+set}" = set; then
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INSTALL="$ac_cv_path_install"
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else
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# As a last resort, use the slow shell script. We don't cache a
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# path for INSTALL within a source directory, because that will
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# break other packages using the cache if that directory is
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# removed, or if the path is relative.
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INSTALL="$ac_install_sh"
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fi
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fi
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dnl We do special magic for INSTALL instead of AC_SUBST, to get
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dnl relative paths right.
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AC_MSG_RESULT($INSTALL)
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AC_SUBST(INSTALL)dnl
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# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
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# It thinks the first close brace ends the variable substitution.
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test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
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AC_SUBST(INSTALL_PROGRAM)dnl
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test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
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AC_SUBST(INSTALL_DATA)dnl
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])
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# mmap(2) blacklisting. Some platforms provide the mmap library routine
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# but don't support all of the features we need from it.
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AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST],
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[
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AC_CHECK_HEADER([sys/mman.h],
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[gcc_header_sys_mman_h=yes], [gcc_header_sys_mman_h=no])
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AC_CHECK_FUNC([mmap], [gcc_func_mmap=yes], [gcc_func_mmap=no])
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if test "$gcc_header_sys_mman_h" != yes \
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|| test "$gcc_func_mmap" != yes; then
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gcc_cv_func_mmap_file=no
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gcc_cv_func_mmap_dev_zero=no
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gcc_cv_func_mmap_anon=no
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else
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AC_CACHE_CHECK([whether read-only mmap of a plain file works],
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gcc_cv_func_mmap_file,
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[# Add a system to this blacklist if
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# mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a
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# memory area containing the same data that you'd get if you applied
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# read() to the same fd. The only system known to have a problem here
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# is VMS, where text files have record structure.
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case "$host_os" in
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vms* | ultrix*)
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gcc_cv_func_mmap_file=no ;;
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*)
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gcc_cv_func_mmap_file=yes;;
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esac])
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AC_CACHE_CHECK([whether mmap from /dev/zero works],
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gcc_cv_func_mmap_dev_zero,
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[# Add a system to this blacklist if it has mmap() but /dev/zero
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# does not exist, or if mmapping /dev/zero does not give anonymous
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# zeroed pages with both the following properties:
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# 1. If you map N consecutive pages in with one call, and then
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# unmap any subset of those pages, the pages that were not
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# explicitly unmapped remain accessible.
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# 2. If you map two adjacent blocks of memory and then unmap them
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# both at once, they must both go away.
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# Systems known to be in this category are Windows (all variants),
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# VMS, and Darwin.
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case "$host_os" in
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vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00)
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gcc_cv_func_mmap_dev_zero=no ;;
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*)
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gcc_cv_func_mmap_dev_zero=yes;;
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esac])
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# Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for.
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AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon,
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[#include <sys/types.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#ifndef MAP_ANONYMOUS
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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],
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[int n = MAP_ANONYMOUS;])],
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gcc_cv_decl_map_anon=yes,
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gcc_cv_decl_map_anon=no)])
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if test $gcc_cv_decl_map_anon = no; then
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gcc_cv_func_mmap_anon=no
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else
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AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
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gcc_cv_func_mmap_anon,
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[# Add a system to this blacklist if it has mmap() and MAP_ANON or
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# MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
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# doesn't give anonymous zeroed pages with the same properties listed
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# above for use of /dev/zero.
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# Systems known to be in this category are Windows, VMS, and SCO Unix.
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case "$host_os" in
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vms* | cygwin* | pe | mingw* | sco* | udk* )
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gcc_cv_func_mmap_anon=no ;;
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*)
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gcc_cv_func_mmap_anon=yes;;
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esac])
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fi
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fi
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if test $gcc_cv_func_mmap_file = yes; then
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AC_DEFINE(HAVE_MMAP_FILE, 1,
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[Define if read-only mmap of a plain file works.])
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fi
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if test $gcc_cv_func_mmap_dev_zero = yes; then
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AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
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[Define if mmap of /dev/zero works.])
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fi
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if test $gcc_cv_func_mmap_anon = yes; then
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AC_DEFINE(HAVE_MMAP_ANON, 1,
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[Define if mmap with MAP_ANON(YMOUS) works.])
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fi
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])
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dnl Locate a program and check that its version is acceptable.
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dnl AC_PROG_CHECK_VER(var, name, version-switch,
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dnl version-extract-regexp, version-glob)
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AC_DEFUN([gcc_AC_CHECK_PROG_VER],
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[AC_REQUIRE([gcc_AC_BUILD_EXEEXT])
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AC_CHECK_PROG([$1], [$2], [$2])
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if test -n "[$]$1"; then
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# Found it, now check the version.
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AC_CACHE_CHECK(for modern $2, gcc_cv_prog_$2_modern,
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[changequote(<<,>>)dnl
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ac_prog_version=`<<$>>$1 $3 2>&1 |
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sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'`
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changequote([,])dnl
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echo "configure:__oline__: version of $2 is $ac_prog_version" >&AS_MESSAGE_LOG_FD
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changequote(<<,>>)dnl
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case $ac_prog_version in
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'') gcc_cv_prog_$2_modern=no;;
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<<$5>>)
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gcc_cv_prog_$2_modern=yes;;
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*) gcc_cv_prog_$2_modern=no;;
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esac
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changequote([,])dnl
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])
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else
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gcc_cv_prog_$2_modern=no
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fi
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])
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dnl Determine if enumerated bitfields are unsigned. ISO C says they can
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dnl be either signed or unsigned.
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dnl
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AC_DEFUN([gcc_AC_C_ENUM_BF_UNSIGNED],
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[AC_CACHE_CHECK(for unsigned enumerated bitfields, gcc_cv_enum_bf_unsigned,
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[AC_RUN_IFELSE([AC_LANG_SOURCE([#include <stdlib.h>
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enum t { BLAH = 128 } ;
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struct s_t { enum t member : 8; } s ;
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int main(void)
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{
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s.member = BLAH;
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if (s.member < 0) exit(1);
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exit(0);
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}])], gcc_cv_enum_bf_unsigned=yes, gcc_cv_enum_bf_unsigned=no, gcc_cv_enum_bf_unsigned=yes)])
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if test $gcc_cv_enum_bf_unsigned = yes; then
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AC_DEFINE(ENUM_BITFIELDS_ARE_UNSIGNED, 1,
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[Define if enumerated bitfields are treated as unsigned values.])
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fi])
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dnl Probe number of bits in a byte.
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dnl Note C89 requires CHAR_BIT >= 8.
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dnl
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AC_DEFUN([gcc_AC_C_CHAR_BIT],
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[AC_CACHE_CHECK(for CHAR_BIT, gcc_cv_decl_char_bit,
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[AC_EGREP_CPP(found,
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[#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifdef CHAR_BIT
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found
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#endif], gcc_cv_decl_char_bit=yes, gcc_cv_decl_char_bit=no)
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])
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if test $gcc_cv_decl_char_bit = no; then
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AC_CACHE_CHECK(number of bits in a byte, gcc_cv_c_nbby,
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[i=8
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gcc_cv_c_nbby=
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while test $i -lt 65; do
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
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[switch(0) {
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case (unsigned char)((unsigned long)1 << $i) == ((unsigned long)1 << $i):
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case (unsigned char)((unsigned long)1<<($i-1)) == ((unsigned long)1<<($i-1)):
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; }])],
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[gcc_cv_c_nbby=$i; break])
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i=`expr $i + 1`
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done
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test -z "$gcc_cv_c_nbby" && gcc_cv_c_nbby=failed
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])
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if test $gcc_cv_c_nbby = failed; then
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AC_MSG_ERROR(cannot determine number of bits in a byte)
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else
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AC_DEFINE_UNQUOTED(CHAR_BIT, $gcc_cv_c_nbby,
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[Define as the number of bits in a byte, if \`limits.h' doesn't.])
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fi
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fi])
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AC_DEFUN([gcc_AC_INITFINI_ARRAY],
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[AC_ARG_ENABLE(initfini-array,
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|
[ --enable-initfini-array use .init_array/.fini_array sections],
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|
[], [
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AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
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gcc_cv_initfini_array, [dnl
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AC_RUN_IFELSE([AC_LANG_SOURCE([
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static int x = -1;
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int main (void) { return x; }
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int foo (void) { x = 0; }
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int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
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[gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
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[gcc_cv_initfini_array=no])])
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enable_initfini_array=$gcc_cv_initfini_array
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])
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if test $enable_initfini_array = yes; then
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AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
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[Define .init_array/.fini_array sections are available and working.])
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fi])
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dnl # _gcc_COMPUTE_GAS_VERSION
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|
dnl # Used by gcc_GAS_VERSION_GTE_IFELSE
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dnl #
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dnl # WARNING:
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dnl # gcc_cv_as_gas_srcdir must be defined before this.
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dnl # This gross requirement will go away eventually.
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|
AC_DEFUN([_gcc_COMPUTE_GAS_VERSION],
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[gcc_cv_as_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
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for f in $gcc_cv_as_bfd_srcdir/configure \
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$gcc_cv_as_gas_srcdir/configure \
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$gcc_cv_as_gas_srcdir/configure.in \
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$gcc_cv_as_gas_srcdir/Makefile.in ; do
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|
gcc_cv_gas_version=`sed -n -e 's/^[[ ]]*\(VERSION=[[0-9]]*\.[[0-9]]*.*\)/\1/p' < $f`
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|
if test x$gcc_cv_gas_version != x; then
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break
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fi
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done
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|
gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"`
|
|
gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"`
|
|
gcc_cv_gas_patch_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)"`
|
|
case $gcc_cv_gas_patch_version in
|
|
"") gcc_cv_gas_patch_version="0" ;;
|
|
esac
|
|
gcc_cv_gas_vers=`expr \( \( $gcc_cv_gas_major_version \* 1000 \) \
|
|
+ $gcc_cv_gas_minor_version \) \* 1000 \
|
|
+ $gcc_cv_gas_patch_version`
|
|
]) []dnl # _gcc_COMPUTE_GAS_VERSION
|
|
|
|
dnl # gcc_GAS_VERSION_GTE_IFELSE([elf,] major, minor, patchlevel,
|
|
dnl # [command_if_true = :], [command_if_false = :])
|
|
dnl # Check to see if the version of GAS is greater than or
|
|
dnl # equal to the specified version.
|
|
dnl #
|
|
dnl # The first ifelse() shortens the shell code if the patchlevel
|
|
dnl # is unimportant (the usual case). The others handle missing
|
|
dnl # commands. Note that the tests are structured so that the most
|
|
dnl # common version number cases are tested first.
|
|
AC_DEFUN([_gcc_GAS_VERSION_GTE_IFELSE],
|
|
[ifelse([$1], elf,
|
|
[if test $in_tree_gas_is_elf = yes \
|
|
&&],
|
|
[if]) test $gcc_cv_gas_vers -ge `expr \( \( $2 \* 1000 \) + $3 \) \* 1000 + $4`
|
|
then dnl
|
|
ifelse([$5],,:,[$5])[]dnl
|
|
ifelse([$6],,,[
|
|
else $6])
|
|
fi])
|
|
|
|
AC_DEFUN([gcc_GAS_VERSION_GTE_IFELSE],
|
|
[AC_REQUIRE([_gcc_COMPUTE_GAS_VERSION])dnl
|
|
ifelse([$1], elf, [_gcc_GAS_VERSION_GTE_IFELSE($@)],
|
|
[_gcc_GAS_VERSION_GTE_IFELSE(,$@)])])
|
|
|
|
dnl gcc_GAS_CHECK_FEATURE(description, cv, [[elf,]major,minor,patchlevel],
|
|
dnl [extra switches to as], [assembler input],
|
|
dnl [extra testing logic], [command if feature available])
|
|
dnl
|
|
dnl Checks for an assembler feature. If we are building an in-tree
|
|
dnl gas, the feature is available if the associated assembler version
|
|
dnl is greater than or equal to major.minor.patchlevel. If not, then
|
|
dnl ASSEMBLER INPUT is fed to the assembler and the feature is available
|
|
dnl if assembly succeeds. If EXTRA TESTING LOGIC is not the empty string,
|
|
dnl then it is run instead of simply setting CV to "yes" - it is responsible
|
|
dnl for doing so, if appropriate.
|
|
AC_DEFUN([gcc_GAS_CHECK_FEATURE],
|
|
[AC_CACHE_CHECK([assembler for $1], [$2],
|
|
[[$2]=no
|
|
ifelse([$3],,,[dnl
|
|
if test $in_tree_gas = yes; then
|
|
gcc_GAS_VERSION_GTE_IFELSE($3, [[$2]=yes])
|
|
el])if test x$gcc_cv_as != x; then
|
|
echo ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]') > conftest.s
|
|
if AC_TRY_COMMAND([$gcc_cv_as $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD])
|
|
then
|
|
ifelse([$6],, [$2]=yes, [$6])
|
|
else
|
|
echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
|
|
cat conftest.s >&AS_MESSAGE_LOG_FD
|
|
fi
|
|
rm -f conftest.o conftest.s
|
|
fi])
|
|
ifelse([$7],,,[dnl
|
|
if test $[$2] = yes; then
|
|
$7
|
|
fi])])
|
|
|
|
dnl GCC_TARGET_TEMPLATE(KEY)
|
|
dnl ------------------------
|
|
dnl Define KEY as a valid configure key on the target machine.
|
|
|
|
m4_define([GCC_TARGET_TEMPLATE],
|
|
[m4_define([GCC_TARGET_TEMPLATE($1)],[])])
|
|
|
|
dnl AH_TEMPLATE(KEY, DESCRIPTION)
|
|
dnl -----------------------------
|
|
dnl Issue an autoheader template for KEY, i.e., a comment composed of
|
|
dnl DESCRIPTION (properly wrapped), and then #undef KEY. Redefinition
|
|
dnl of the macro in autoheader.m4, to support definition of only a few
|
|
dnl keys while compiling target libraries.
|
|
|
|
m4_define([AH_TEMPLATE],
|
|
[AH_VERBATIM([$1],m4_text_wrap([$2 */], [ ], [/* ])
|
|
m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[#ifndef USED_FOR_TARGET
|
|
])[#undef $1]m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[
|
|
#endif
|
|
]))])
|
|
|
|
dnl Make sure that build_exeext is looked for
|
|
AC_DEFUN([gcc_AC_BUILD_EXEEXT], [
|
|
ac_executable_extensions="$build_exeext"])
|
|
|