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dnl
dnl $Id$
dnl
dnl Check for target gcc
dnl
dnl Adaptation of autoconf-2.12's AC_PROG_CC to rtems
dnl
dnl 98/02/10 Ralf Corsepius (corsepiu@faw.uni-ulm.de)
dnl
AC_DEFUN(RTEMS_PROG_CC,
[
AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_BEFORE([$0], [AC_PROG_CC])dnl
AC_CHECK_PROG(CC, gcc, gcc)
if test -z "$CC"; then
AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi
RTEMS_PROG_CC_WORKS
AC_PROG_CC_GNU
if test $ac_cv_prog_gcc = yes; then
GCC=yes
dnl Check whether -g works, even if CFLAGS is set, in case the package
dnl plays around with CFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
AC_PROG_CC_G
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
elif test $ac_cv_prog_cc_g = yes; then
CFLAGS="-g -O2"
else
CFLAGS="-O2"
fi
else
GCC=
test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
CC_FOR_TARGET=$CC
rtems_cv_prog_gcc=$ac_cv_prog_gcc
rtems_cv_prog_cc_g=$ac_cv_prog_cc_g
dnl restore initial values
unset CC
unset ac_cv_prog_gcc
unset ac_cv_prog_cc_g
unset ac_cv_prog_CC
])
dnl Almost identical to AC_PROG_CC_WORKS
dnl added malloc to program fragment, because rtems has its own malloc
dnl which is not available while bootstrapping rtems
AC_DEFUN(RTEMS_PROG_CC_WORKS,
[AC_MSG_CHECKING([whether the target C compiler ($CC $CFLAGS $LDFLAGS) works])
AC_LANG_SAVE
AC_LANG_C
AC_TRY_COMPILER(
[
#if defined(__PPC__)
int __SDATA_START__; int __SDATA2_START__;
int __GOT_START__; int __GOT_END__;
int __GOT2_START__; int __GOT2_END__;
int __SBSS_END__; int __SBSS2_END__;
int __FIXUP_START__; int __FIXUP_END__;
int __EXCEPT_START__; int __EXCEPT_END__;
int __init; int __fini;
#endif
#if defined(__hppa__)
asm ( ".subspa \$GLOBAL\$,QUAD=1,ALIGN=8,ACCESS=0x1f,SORT=40");
asm ( ".export \$global\$" );
asm ( "\$global\$:");
#endif
int atexit() { return 0; }
void *malloc() { return 0; }
main(){return(0);}],
rtems_cv_prog_cc_works, rtems_cv_prog_cc_cross)
AC_LANG_RESTORE
AC_MSG_RESULT($rtems_cv_prog_cc_works)
if test $rtems_cv_prog_cc_works = no; then
AC_MSG_ERROR([installation or configuration problem: target C compiler cannot create executables.])
fi
AC_MSG_CHECKING([whether the target C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler])
AC_MSG_RESULT($rtems_cv_prog_cc_cross)
])
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