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https://github.com/samba-team/samba.git
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335e741671
as PROG_CC will set CFLAGS to the default ones
normaly "-g -O2"
metze
(This used to be commit 424af1a9df)
90 lines
2.7 KiB
Plaintext
90 lines
2.7 KiB
Plaintext
dnl SMB Build Environment CC Checks
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dnl -------------------------------------------------------
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dnl Copyright (C) Stefan (metze) Metzmacher 2004
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dnl Released under the GNU GPL
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dnl -------------------------------------------------------
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dnl
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AC_PROG_CC
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if test x"$CC" = x""; then
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AC_MSG_WARN([No c compiler was not found!])
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AC_MSG_ERROR([Please Install gcc from http://gcc.gnu.org/])
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fi
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dnl needed before AC_TRY_COMPILE
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AC_ISC_POSIX
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dnl Check if C compiler understands -c and -o at the same time
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AC_PROG_CC_C_O
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if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
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BROKEN_CC=
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else
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BROKEN_CC=#
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fi
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AC_SUBST(BROKEN_CC)
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AC_CACHE_CHECK([that the C compiler can precompile header files],samba_cv_precompiled_headers, [
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dnl Check whether the compiler can generate precompiled headers
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touch conftest.h
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if ${CC-cc} conftest.h 2> /dev/null && test -f conftest.h.gch; then
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samba_cv_precompiled_headers=yes
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else
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samba_cv_precompiled_headers=no
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fi])
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PCH_AVAILABLE="#"
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if test x"$samba_cv_precompiled_headers" = x"yes"; then
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PCH_AVAILABLE=""
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fi
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AC_SUBST(PCH_AVAILABLE)
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dnl Check if the C compiler understands volatile (it should, being ANSI).
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AC_CACHE_CHECK([that the C compiler understands volatile],samba_cv_volatile, [
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AC_TRY_COMPILE([#include <sys/types.h>],[volatile int i = 0],
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samba_cv_volatile=yes,samba_cv_volatile=no)])
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if test x"$samba_cv_volatile" = x"yes"; then
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AC_DEFINE(HAVE_VOLATILE, 1, [Whether the C compiler understands volatile])
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fi
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############################################
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# check if the compiler can do immediate structures
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AC_CACHE_CHECK([for immediate structures],samba_cv_immediate_structures, [
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AC_TRY_COMPILE([
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#include <stdio.h>],
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[
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typedef struct {unsigned x;} FOOBAR;
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#define X_FOOBAR(x) ((FOOBAR) { x })
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#define FOO_ONE X_FOOBAR(1)
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FOOBAR f = FOO_ONE;
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static struct {
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FOOBAR y;
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} f2[] = {
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{FOO_ONE}
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};
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],
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samba_cv_immediate_structures=yes,samba_cv_immediate_structures=no)])
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if test x"$samba_cv_immediate_structures" = x"yes"; then
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AC_DEFINE(HAVE_IMMEDIATE_STRUCTURES,1,[Whether the compiler supports immediate structures])
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fi
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AC_MSG_CHECKING([for test routines])
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AC_TRY_RUN([#include "${srcdir-.}/build/tests/trivial.c"],
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AC_MSG_RESULT(yes),
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AC_MSG_ERROR([cant find test code. Aborting config]),
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AC_MSG_WARN([cannot run when cross-compiling]))
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#
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# Check if the compiler can handle the options we selected by
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# --enable-*developer
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#
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if test -n "$DEVELOPER_CFLAGS"; then
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OLD_CFLAGS="${CFLAGS}"
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CFLAGS="${CFLAGS} ${DEVELOPER_CFLAGS}"
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AC_MSG_CHECKING([that the C compiler can use the DEVELOPER_CFLAGS])
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AC_TRY_RUN([#include "${srcdir-.}/build/tests/trivial.c"],
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AC_MSG_RESULT(yes),
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DEVELOPER_CFLAGS=""; AC_MSG_RESULT(no),
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AC_MSG_WARN([cannot run when cross-compiling]))
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CFLAGS="${OLD_CFLAGS}"
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fi
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