diff options
Diffstat (limited to 'aclocal/prog-cc.m4')
-rw-r--r-- | aclocal/prog-cc.m4 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/aclocal/prog-cc.m4 b/aclocal/prog-cc.m4 new file mode 100644 index 0000000000..755cecfe35 --- /dev/null +++ b/aclocal/prog-cc.m4 @@ -0,0 +1,76 @@ +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 $LDFLAGS) works]) +AC_LANG_SAVE +AC_LANG_C +AC_TRY_COMPILER( +[void *malloc() { return 0; } + main(){return(0);}], +rtems_cv_prog_cc_works, rtems_cv_prog_cc_cross) +AC_LANG_RESTORE +AC_MSG_RESULT($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) +]) |