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build: beware of Clang++ not supporting POSIXLY_CORRECT

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* m4/c-working.m4 (BISON_LANG_COMPILER_POSIXLY_CORRECT): New.
(BISON_C_COMPILER_POSIXLY_CORRECT): Use it.
For consistency with C++, also define BISON_C_WORKS.
* m4/cxx.m4 (BISON_CXX_COMPILER_POSIXLY_CORRECT): New.
* configure.ac: Use it.
* tests/atlocal.in: Get its result.
Propagate properly CXX values when used to compile C.
When POSIXLY_CORRECT, adjust BISON_C_WORKS and BISON_CXX_WORKS.
* tests/local.at (AT_COMPILE): Use BISON_C_WORKS.
This commit is contained in:
Akim Demaille
2012-12-08 19:33:50 +01:00
parent 09a1cd5e58
commit d4728d92c7
5 changed files with 61 additions and 33 deletions
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9
m4/cxx.m4
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@@ -58,3 +58,12 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
AC_SUBST([BISON_CXX_WORKS])
AM_CONDITIONAL(BISON_CXX_WORKS, test $bison_cv_cxx_works = yes)
])
# BISON_CXX_COMPILER_POSIXLY_CORRECT
# ----------------------------------
# Whether the C++ compiler supports -g in POSIXLY_CORRECT mode.
AC_DEFUN([BISON_CXX_COMPILER_POSIXLY_CORRECT],
[AC_LANG_PUSH([C++])
BISON_LANG_COMPILER_POSIXLY_CORRECT
AC_LANG_POP([C++])
])