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| author | Akim Demaille <akim@lrde.epita.fr> | 2012-12-08 19:33:50 +0100 |
|---|---|---|
| committer | Akim Demaille <akim@lrde.epita.fr> | 2012-12-09 13:07:47 +0100 |
| commit | d4728d92c7c03279612271a5a4c1ae7e1e324971 (patch) | |
| tree | f10f3ab655e8a6a8d484beeeb89014f14ca7f2a7 /m4 | |
| parent | 09a1cd5e5865d8d8cf2c5e172f6f0fdaf6e01960 (diff) | |
| download | bison-d4728d92c7c03279612271a5a4c1ae7e1e324971.tar.gz | |
build: beware of Clang++ not supporting POSIXLY_CORRECT
* 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.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/c-working.m4 | 42 | ||||
| -rw-r--r-- | m4/cxx.m4 | 9 |
2 files changed, 34 insertions, 17 deletions
diff --git a/m4/c-working.m4 b/m4/c-working.m4 index 0db60f76..de1a4c5a 100644 --- a/m4/c-working.m4 +++ b/m4/c-working.m4 @@ -24,6 +24,7 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_C_COMPILER], [ int test_array[CHAR_BIT];]])], [], [AC_MSG_FAILURE([cannot compile a simple C program])]) + AC_SUBST([BISON_C_WORKS], [:]) ]) # BISON_CHECK_WITH_POSIXLY_CORRECT(CODE) @@ -47,25 +48,32 @@ case $gl_had_POSIXLY_CORRECT in esac ]) +# BISON_LANG_COMPILER_POSIXLY_CORRECT +# ----------------------------------- +# Whether the compiler for the current language supports -g in +# POSIXLY_CORRECT mode. clang-2.9 on OS X does not, because +# "clang-mp-2.9 -o test -g test.c" launches "/usr/bin/dsymutil test -o +# test.dSYM" which fails with "error: unable to open executable '-o'". +# +# Sets <LANG>_COMPILER_POSIXLY_CORRECT to true/false. +AC_DEFUN([BISON_LANG_COMPILER_POSIXLY_CORRECT], +[AC_CACHE_CHECK([whether $_AC_CC supports POSIXLY_CORRECT=1], + [bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct], +[BISON_CHECK_WITH_POSIXLY_CORRECT( +[AC_LINK_IFELSE([AC_LANG_PROGRAM], + [bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct=yes], + [bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct=no])])]) +case $bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct in + yes) AC_SUBST(_AC_LANG_PREFIX[_COMPILER_POSIXLY_CORRECT], [true]) ;; + no) AC_SUBST(_AC_LANG_PREFIX[_COMPILER_POSIXLY_CORRECT], [false]);; +esac +]) + # BISON_C_COMPILER_POSIXLY_CORRECT # -------------------------------- -# Whether the compiler supports -g in POSIXLY_CORRECT mode. clang-2.9 -# on OS X does not, because "clang-mp-2.9 -o test -g test.c" launches -# "/usr/bin/dsymutil test -o test.dSYM" which fails with "error: -# unable to open executable '-o'". -# -# Sets C_COMPILER_POSIXLY_CORRECT to true/false. +# Whether the C compiler supports -g in POSIXLY_CORRECT mode. AC_DEFUN([BISON_C_COMPILER_POSIXLY_CORRECT], -[AC_CACHE_CHECK([whether $CC supports POSIXLY_CORRECT=1], - [bison_cv_cc_supports_posixly_correct], -[BISON_CHECK_WITH_POSIXLY_CORRECT( [AC_LANG_PUSH([C]) -AC_LINK_IFELSE([AC_LANG_PROGRAM], - [bison_cv_cc_supports_posixly_correct=yes], - [bison_cv_cc_supports_posixly_correct=no]) -AC_LANG_POP([C])])]) -case $bison_cv_cc_supports_posixly_correct in - yes) AC_SUBST([C_COMPILER_POSIXLY_CORRECT], [true]) ;; - no) AC_SUBST([C_COMPILER_POSIXLY_CORRECT], [false]);; -esac +BISON_LANG_COMPILER_POSIXLY_CORRECT +AC_LANG_POP([C]) ]) @@ -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++]) +]) |