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Unset CFLAGS before reading template. This should be more robust.

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When --enable-debug is used, then the default CFLAGS for non-GCC is just
-g without -O.

Backpatch enhancement of Autoconf inline test that detects problems with
the HP C compiler.
This commit is contained in:
Peter Eisentraut
2003-11-01 20:48:51 +00:00
parent 0543af2f12
commit 801427abc2
3 changed files with 58 additions and 11 deletions
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42
config/c-compiler.m4
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@ -1,5 +1,5 @@
# Macros to detect C compiler features
# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.9 2003/10/25 15:32:11 petere Exp $
# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.10 2003/11/01 20:48:51 petere Exp $
# PGAC_C_SIGNED
@ -149,3 +149,43 @@ CFLAGS=$pgac_save_CFLAGS
if test "$ac_env_CFLAGS_set" != set; then
CFLAGS="$CFLAGS $pgac_cv_prog_cc_no_strict_aliasing"
fi])# PGAC_PROG_CC_NO_STRICT_ALIASING
# The below backpatches the following Autoconf change:
#
# 2002-03-28 Kevin Ryde <user42@zip.com.au>
#
# * lib/autoconf/c.m4 (AC_C_INLINE): Test with a typedef return value,
# to avoid versions of HP C which don't allow that.
#
# When we upgrade to Autoconf >= 2.53a then we can drop this and rely
# on the standard macro.
# AC_C_INLINE
# -----------
# Do nothing if the compiler accepts the inline keyword.
# Otherwise define inline to __inline__ or __inline if one of those work,
# otherwise define inline to be empty.
AC_DEFUN([AC_C_INLINE],
[AC_REQUIRE([AC_PROG_CC_STDC])dnl
AC_CACHE_CHECK([for inline], ac_cv_c_inline,
[ac_cv_c_inline=no
for ac_kw in inline __inline__ __inline; do
AC_COMPILE_IFELSE([AC_LANG_SOURCE(
[#ifndef __cplusplus
typedef int foo_t;
static $ac_kw foo_t static_foo () {return 0; }
$ac_kw int foo () {return 0; }
#endif
])],
[ac_cv_c_inline=$ac_kw; break])
done
])
case $ac_cv_c_inline in
inline | yes) ;;
no) AC_DEFINE(inline,,
[Define as `__inline' if that's what the C compiler calls it,
or to nothing if it is not supported.]) ;;
*) AC_DEFINE_UNQUOTED(inline, $ac_cv_c_inline) ;;
esac
])# AC_C_INLINE