c697fb7f7c
It is added an INTERNALLIB and not installed. It will be used by kyua. This is a preparatory commit for D24103. Reviewed by: emaste Obtained from: CheriBSD Sponsored by: DARPA
101 lines
3.7 KiB
Plaintext
101 lines
3.7 KiB
Plaintext
dnl Copyright 2010 Google Inc.
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dnl All rights reserved.
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dnl
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dnl Redistribution and use in source and binary forms, with or without
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dnl modification, are permitted provided that the following conditions are
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dnl met:
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dnl
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dnl * Redistributions of source code must retain the above copyright
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dnl notice, this list of conditions and the following disclaimer.
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dnl * Redistributions in binary form must reproduce the above copyright
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dnl notice, this list of conditions and the following disclaimer in the
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dnl documentation and/or other materials provided with the distribution.
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dnl * Neither the name of Google Inc. nor the names of its contributors
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dnl may be used to endorse or promote products derived from this software
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dnl without specific prior written permission.
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dnl
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dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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dnl "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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dnl OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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dnl SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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dnl LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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dnl DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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dnl THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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dnl OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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dnl
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dnl KYUA_REQUIRE_CXX
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dnl
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dnl Ensures the C++ compiler detected by AC_PROG_CXX is present and works.
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dnl The compiler check should be performed here, but it seems like Autoconf
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dnl does not allow it.
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dnl
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AC_DEFUN([KYUA_REQUIRE_CXX], [
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AC_CACHE_CHECK([whether the C++ compiler works],
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[atf_cv_prog_cxx_works],
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[AC_LANG_PUSH([C++])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
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[atf_cv_prog_cxx_works=yes],
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[atf_cv_prog_cxx_works=no])
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AC_LANG_POP([C++])])
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if test "${atf_cv_prog_cxx_works}" = no; then
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AC_MSG_ERROR([C++ compiler cannot create executables])
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fi
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])
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dnl
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dnl KYUA_ATTRIBUTE_NORETURN
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dnl
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dnl Checks if the current compiler has a way to mark functions that do not
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dnl return and defines ATTRIBUTE_NORETURN to the appropriate string.
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dnl
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AC_DEFUN([KYUA_ATTRIBUTE_NORETURN], [
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dnl This check is overly simple and should be fixed. For example,
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dnl Sun's cc does support the noreturn attribute but CC (the C++
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dnl compiler) does not. And in that case, CC just raises a warning
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dnl during compilation, not an error.
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AC_MSG_CHECKING(whether __attribute__((noreturn)) is supported)
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AC_RUN_IFELSE([AC_LANG_PROGRAM([], [
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#if ((__GNUC__ == 2 && __GNUC_MINOR__ >= 5) || __GNUC__ > 2)
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return 0;
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#else
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return 1;
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#endif
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])],
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[AC_MSG_RESULT(yes)
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value="__attribute__((noreturn))"],
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[AC_MSG_RESULT(no)
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value=""]
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)
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AC_SUBST([ATTRIBUTE_NORETURN], [${value}])
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])
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dnl
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dnl KYUA_ATTRIBUTE_UNUSED
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dnl
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dnl Checks if the current compiler has a way to mark parameters as unused
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dnl so that the -Wunused-parameter warning can be avoided.
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dnl
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AC_DEFUN([KYUA_ATTRIBUTE_UNUSED], [
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AC_MSG_CHECKING(whether __attribute__((__unused__)) is supported)
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([
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static void
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function(int a __attribute__((__unused__)))
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{
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}], [
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function(3);
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return 0;
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])],
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[AC_MSG_RESULT(yes)
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value="__attribute__((__unused__))"],
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[AC_MSG_RESULT(no)
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value=""]
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)
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AC_SUBST([ATTRIBUTE_UNUSED], [${value}])
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])
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