270 lines
8.4 KiB
Plaintext
270 lines
8.4 KiB
Plaintext
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# Process this file with autoconf to produce a configure script, like so:
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# aclocal -I .. -I ../config && autoconf && autoheader && automake
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AC_PREREQ(2.59)
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AC_INIT(libmudflap, 1.0)
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AC_CONFIG_SRCDIR(mf-runtime.c)
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AC_CANONICAL_SYSTEM
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ACX_NONCANONICAL_TARGET
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AM_INIT_AUTOMAKE
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AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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AC_ARG_ENABLE(version-specific-runtime-libs,
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[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
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[case "$enableval" in
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yes) version_specific_libs=yes ;;
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no) version_specific_libs=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[version_specific_libs=no])
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AC_MSG_RESULT($version_specific_libs)
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AM_MAINTAINER_MODE
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AC_EXEEXT
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AM_ENABLE_MULTILIB(, ..)
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target_alias=${target_alias-$host_alias}
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AC_SUBST(target_alias)
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AC_CONFIG_HEADERS(config.h)
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AC_LANG_C
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# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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if test "x$GCC" != "xyes"; then
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AC_MSG_ERROR([libmudflap must be built with GCC])
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fi
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AC_PROG_CPP
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# Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in
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# symbol interposition. We disable shared libraries for these.
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AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available])
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AC_TRY_COMPILE([
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#define _GNU_SOURCE
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#include <dlfcn.h>
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],
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[void *foo = dlsym (RTLD_NEXT, "exit");],
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[AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(no)
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enable_shared=no])
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AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \
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netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \
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sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h)
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AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)
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AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64)
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AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf)
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AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname)
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AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc)
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AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent)
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AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r)
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AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror)
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AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber)
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AC_CHECK_FUNCS(getmntent setmntent addmntent)
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AC_CHECK_FUNCS(inet_ntoa mmap munmap)
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AC_TRY_COMPILE([#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0])
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if test $mf_have_semun = 1
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then
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AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h])
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fi
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AC_MSG_CHECKING([for socklen_t in sys/socket.h])
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AC_TRY_COMPILE([#define _POSIX_PII_SOCKET
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#include <sys/types.h>
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#include <sys/socket.h>], [socklen_t x = 5;],
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[AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.])
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AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(no)])
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AC_LIBTOOL_DLOPEN
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AM_PROG_LIBTOOL
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AC_SUBST(enable_shared)
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AC_SUBST(enable_static)
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AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0])
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AC_SUBST(MF_HAVE_STDINT_H)
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if test $MF_HAVE_STDINT_H = 1
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then
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MF_HAVE_UINTPTR_T=1
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else
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AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;],
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[MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0])
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fi
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AC_SUBST(MF_HAVE_UINTPTR_T)
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if test ! -d pth
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then
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# libmudflapth objects are built in this subdirectory
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mkdir pth
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fi
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AC_CHECK_HEADERS(pthread.h)
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AC_MSG_CHECKING([for thread model used by GCC])
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target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
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AC_MSG_RESULT([$target_thread_file])
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# We only support posix threads, or no threads at all.
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posix_threads=
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case ${target_thread_file} in
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posix)
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posix_threads=yes
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;;
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single)
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;;
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*)
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echo "${target_thread_file} is an unsupported thread package" 1>&2
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exit 1
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;;
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esac
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AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$posix_threads" != "x"])
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if test "x$posix_threads" != "x"
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then
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build_libmudflapth=1
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else
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build_libmudflapth=0
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fi
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AC_SUBST(build_libmudflapth)
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AC_CHECK_LIB(dl, dlsym)
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# Calculate toolexeclibdir
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# Also toolexecdir, though it's only used in toolexeclibdir
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case ${version_specific_libs} in
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yes)
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# Need the gcc compiler version to know where to install libraries
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# and header files if --enable-version-specific-runtime-libs option
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# is selected.
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toolexecdir='$(libdir)/gcc/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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;;
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no)
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if test -n "$with_cross_host" &&
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test x"$with_cross_host" != x"no"; then
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# Install a library built with a cross compiler in tooldir, not libdir.
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toolexecdir='$(exec_prefix)/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/lib'
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else
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toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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toolexeclibdir='$(libdir)'
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fi
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multi_os_directory=`$CC -print-multi-os-directory`
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case $multi_os_directory in
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.) ;; # Avoid trailing /.
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*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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esac
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;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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includedir=${toolexecdir}/include
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AC_SUBST(includedir)
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pthread_create_version='""'
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if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then
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# NB: don't check for -lpthread here, because then it would be
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# added to LIBS. For the thread-unaware libmudflap.la, we don't
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# want it there.
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# glibc-related hacks. dlsym() may pick the wrong version of
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# interposed functions like pthread_create on modern glibc.
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# We need to find the proper symbol version string, and use
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# the nonstandard dlvsym().
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AC_CHECK_FUNCS(dlvsym)
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AC_CHECK_TOOL(NM, nm)
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if test "x$ac_cv_have_dlvsym" != "x"; then
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# Try compiling a simple pthreads program. Find the shared libraries it
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# ends up with. Then use "nm" on those libraries to extract the
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# default symbol versioning suffix ("@@"), if any. But that's tricky.
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# Rather, run nm on the resulting executable. Unfortunately, autoconf
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# doesn't appear to have a macro that builds a test executable for
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# subsequent analysis ... so we do it by hand here.
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cat >> conftest.c << EOF
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#include <pthread.h>
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int main () { void *p = (void *) & pthread_create; return (int) p; }
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EOF
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oldLIBS="$LIBS"
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LIBS="$LIBS -lpthread"
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pthread_create_version="\"\""
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AC_MSG_CHECKING(pthread_create symbol version)
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if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then
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version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'`
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if test "x$version" != "x"; then
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pthread_create_version="\"$version\""
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fi
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fi
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AC_MSG_RESULT($pthread_create_version)
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LIBS="$oldLIBS"
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fi
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fi
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AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version])
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# Figure out whether the compiler supports "-ffunction-sections -fdata-sections",
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# similarly to how libstdc++ does it
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ac_test_CFLAGS="${CFLAGS+set}"
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ac_save_CFLAGS="$CFLAGS"
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# Check for -ffunction-sections -fdata-sections
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AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections])
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CFLAGS='-Werror -ffunction-sections -fdata-sections'
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AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
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if test "$ac_test_CFLAGS" = set; then
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CFLAGS="$ac_save_CFLAGS"
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else
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# this is the suspicious part
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CFLAGS=""
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fi
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if test x"$ac_fdsections" = x"yes"; then
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SECTION_FLAGS='-ffunction-sections -fdata-sections'
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fi
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AC_MSG_RESULT($ac_fdsections)
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AC_SUBST(SECTION_FLAGS)
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# Check for the name of the symbol used for the entry point.
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AC_CACHE_CHECK([for the name of the symbol used for the entry point],
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[mudflap_cv_entry_point], [
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for name in _start __start unknown; do
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AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])],
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[break])
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done
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mudflap_cv_entry_point="$name"])
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if test "$mudflap_cv_entry_point" = unknown; then
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AC_MSG_ERROR([none of the known symbol names works])
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fi
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AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point],
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[Define to the name of the symbol used for the entry point.])
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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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# See if we support thread-local storage.
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GCC_CHECK_TLS
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AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp])
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AC_OUTPUT
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