diff options
Diffstat (limited to 'config/c-compiler.m4')
| -rw-r--r-- | config/c-compiler.m4 | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index 4ec3b70e897..8db95b90ac2 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -1,5 +1,35 @@ # Macros to detect C compiler features -# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.2 2000/08/27 19:00:22 petere Exp $ +# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.3 2000/08/29 09:36:37 petere Exp $ + + +# PGAC_C_SIGNED +# ------------- +# Check if the C compiler understands signed types. +AC_DEFUN([PGAC_C_SIGNED], +[AC_CACHE_CHECK(for signed types, pgac_cv_c_signed, +[AC_TRY_COMPILE([], +[signed char c; signed short s; signed int i;], +[pgac_cv_c_signed=yes], +[pgac_cv_c_signed=no])]) +if test x"$pgac_cv_c_signed" = xno ; then + AC_DEFINE(signed,, [Define empty if the C compiler does not understand signed types]) +fi])# PGAC_C_SIGNED + + + +# PGAC_C_VOLATILE +# --------------- +# Check if the C compiler understands `volatile'. Note that if it doesn't +# then this will potentially break the program semantics. +AC_DEFUN([PGAC_C_VOLATILE], +[AC_CACHE_CHECK(for volatile, pgac_cv_c_volatile, +[AC_TRY_COMPILE([], +[extern volatile int i;], +[pgac_cv_c_volatile=yes], +[pgac_cv_c_volatile=no])]) +if test x"$pgac_cv_c_volatile" = xno ; then + AC_DEFINE(volatile,, [Define empty if the C compiler does not understand `volatile']) +fi])# PGAC_C_VOLATILE |