# Macros to detect C compiler features
-# $PostgreSQL: pgsql/config/c-compiler.m4,v 1.20 2010/02/13 02:34:08 tgl Exp $
+# config/c-compiler.m4
# PGAC_C_SIGNED
# Given a string, check if the compiler supports the string as a
# command-line option. If it does, add the string to CFLAGS.
AC_DEFUN([PGAC_PROG_CC_CFLAGS_OPT],
-[AC_MSG_CHECKING([if $CC supports $1])
-pgac_save_CFLAGS=$CFLAGS
+[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_cflags_$1])])dnl
+AC_CACHE_CHECK([whether $CC supports $1], [Ac_cachevar],
+[pgac_save_CFLAGS=$CFLAGS
CFLAGS="$pgac_save_CFLAGS $1"
+ac_save_c_werror_flag=$ac_c_werror_flag
+ac_c_werror_flag=yes
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
- AC_MSG_RESULT(yes),
- [CFLAGS="$pgac_save_CFLAGS"
- AC_MSG_RESULT(no)])
+ [Ac_cachevar=yes],
+ [Ac_cachevar=no])
+ac_c_werror_flag=$ac_save_c_werror_flag
+CFLAGS="$pgac_save_CFLAGS"])
+if test x"$Ac_cachevar" = x"yes"; then
+ CFLAGS="$CFLAGS $1"
+fi
+undefine([Ac_cachevar])dnl
])# PGAC_PROG_CC_CFLAGS_OPT
# you can link to a particular function, not just whether you can link.
# In fact, we must actually check that the resulting program runs :-(
AC_DEFUN([PGAC_PROG_CC_LDFLAGS_OPT],
-[AC_MSG_CHECKING([if $CC supports $1])
-pgac_save_LDFLAGS=$LDFLAGS
+[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_ldflags_$1])])dnl
+AC_CACHE_CHECK([whether $CC supports $1], [Ac_cachevar],
+[pgac_save_LDFLAGS=$LDFLAGS
LDFLAGS="$pgac_save_LDFLAGS $1"
AC_RUN_IFELSE([AC_LANG_PROGRAM([extern void $2 (); void (*fptr) () = $2;],[])],
- AC_MSG_RESULT(yes),
- [LDFLAGS="$pgac_save_LDFLAGS"
- AC_MSG_RESULT(no)],
- [LDFLAGS="$pgac_save_LDFLAGS"
- AC_MSG_RESULT(assuming no)])
+ [Ac_cachevar=yes],
+ [Ac_cachevar=no],
+ [Ac_cachevar="assuming no"])
+LDFLAGS="$pgac_save_LDFLAGS"])
+if test x"$Ac_cachevar" = x"yes"; then
+ LDFLAGS="$LDFLAGS $1"
+fi
+undefine([Ac_cachevar])dnl
])# PGAC_PROG_CC_LDFLAGS_OPT