X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/064e42b0aca1db0ca84b06b01cac5a40f3016591..3fd1d6b2f36722c64f8db77400c6f6a2639ebae0:/m4/c-working.m4

diff --git a/m4/c-working.m4 b/m4/c-working.m4
index ee84acf9..999c52de 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])
 ])