path: root/aclocal.m4
diff options
authorJoel Sherrill <>1998-06-27 17:09:47 +0000
committerJoel Sherrill <>1998-06-27 17:09:47 +0000
commit98100d275f62a034917d0b1f3157053e6c130005 (patch)
treef396a0ea43f9f8d484241d6f28717cce72cb9ef6 /aclocal.m4
parentd13b247131b9cd3d0e4c066c246fffe573b0ed0a (diff)
Monstrous patch from Ralf Corsepius <>. I have
made no attempt to divide the comments up and place them with just the appropriate files. Here is an excerpt from Ralf's email: Changes including comments on changes I made after cycling through all the targets: * Added ranlib support. Now all targets use "ranlib" instead of "ar -s" to build an index for a library. If ranlib isn't detected during configuration, check if ar -s is working and try "ar -s" instead of * Removed $(XXX_FOR_TARGET) from make/, use $(XXX) instead now. * gcc-target-default.cfg: LINK_XXXX-defines reworked to solve the -l problem under posix (cf gcc-target-default.cfg) * rtems-glom replaced by Makefile-rules inside of the wrapup/ that has been using rtems-glom until now. * Removed CCC and friends in gcc-target-default.cfg, as they have been breaking CXX support. * Removed CONFIG.$(TARGET_ARCH).CC lines from several custom/*.cfg files, because this is now set in custom/default.cfg. * Added aclocal/ar-s.m4, check whether "ar -s" is working * Added aclocal/cygwin.m4 and aclocal/exeext.m4. * Reworked aclocal/canonicalize-tools.m4: Added ar -s check; fixes for problems when XXX_FOR_TARGET is given via environment variables (didn't work for gcc until now), adding cygwin check, improved autoconf-cache handling. * Removed -l from make rule dependencies. LINK_LIBS is now allowed to contain -L and -l. LINK_OBJS and LINK_FILES must not contain -L or -l. gcc28 make-exe rules now link using $(LINK_OBJS) $(LINK_LIBS) => Almost all custom/*.cfg are modified. This is very likely to break something because of typos or having missed to edit a file. Open problems, known bugs, things I didn't do: * custom/p4000.cfg seems to be out of date and requires to be reviewed. (JRS NOTE: It is subordinate p4650 and p4600 -- both of which build ok after minor changes.) * custom/psim.cfg needs to be reviewed, I added some changes to it, I am insecure about. (JRS NOTE: psim had a minor problem endif/endef swapped but runs fine.) * can now be removed. * gcc*.cfg files "make depend" rules don't honor language specific flags (e.g CXXFLAGS is ignored for *.cc) - Nothing to worry about now, but may cause problems for hosts/targets not using gcc or rtems-add-ons that use external packages. * AFAIS, the no_bsp BSP can't be build anymore, i.e. configure refused to configure for it whatever I tried. * The toplevel and toplevel+1 README files are quite out-dated * cygwin.m4 isn't of much use for rtems. In most cases (cf. aclocal/*.m4) it is worked around by directly using $host_os. I think I'll remove it soon after the next snapshot * Before release the cygwin patch needs to be tested under cygwin. I may have broken/missed something (esp. the sed-pattern to convert \\ into / may be broken). * You should try to build/run the posix-BSP under solaris - I don't expect problems, but I am not 100% sure, esp. with regard to ranlib/ar -s. * You should consider to convert all make/compilers/*.cfg files into make/compilers/* files and let autoconf generate the *.cfg. This may help getting rid of some if/then/else statements and help hard-coding some defines into those files in future and shouldn't disturb now. * Not having installed libc.a/libm.a on a host may still break building rtems, esp. when using -disable-gcc28 as the gcc27-configuration scheme directly accesses libc.a and libm.a. The problem should not appear when using gcc28 because it references libc/libm only through -lc and -lm which may be static or dynamic (I didn't test this). * shgen is not yet included (I didn't yet have enough time to integrate it). * I know about a few more configure-probs (esp. cross-checking --enable-* flags). + warn/refuse to configure when --enable-libcdir and --enable-gcc28 are given. + force --enable-libcdir when --disable-gcc28 is given * Replaced KSHELL with @KSH@ in some shell scripts generated by * Added a dependency to aclocal/*.m4 in the toplevel Makefile => configure and aclocal.m4 will now be rebuild when any aclocal/*.m4 file is changed * Some changes to aclocal/gcc-pipe.m4 and aclocal/gcc-specs.m4 * Replaced i[[3456]]86-unknown-freebsd2.[[12]] with i[[3456]]86-*freebsd2.* in, as I suppose there might exist a variety of valid vendors (2nd field of the name-tripple) * Disabled override MAKEFLAGS in toplevel - Potential side-effects are not really clear to me. * In mvme162.cfg, $(LINK_LIBS) is missing in the CC line in gcc28's make-exe rule (yet another one I missed to edit). Just append $(LINK_LIBS) to the "CC" line, like I hopefully did to ALL other custom/*.cfg files. * the problem with mvme162lx.cfg is a follow-up problem of the mvme162.cfg-bug. * mvme162/console and idp/console had variables named Buffer which conflicted with similarly named variables in some tests.
Diffstat (limited to 'aclocal.m4')
1 files changed, 169 insertions, 33 deletions
diff --git a/aclocal.m4 b/aclocal.m4
index 3329007592..5ca10a3f01 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -151,12 +151,14 @@ dnl
AC_CACHE_CHECK(whether $CC_FOR_TARGET accepts -specs,rtems_cv_gcc_specs,
-[touch confspec
-echo 'void f(){}' >conftest.c
-if test -z "`${CC_FOR_TARGET} -specs confspec -c conftest.c 2>&1`";then
- rtems_cv_gcc_specs=yes
- rtems_cv_gcc_specs=no
+if test "$rtems_cv_prog_gcc" = "yes"; then
+ touch confspec
+ echo 'void f(){}' >conftest.c
+ if test -z "`${CC_FOR_TARGET} -specs confspec -c conftest.c 2>&1`";then
+ rtems_cv_gcc_specs=yes
+ fi
rm -f confspec conftest*
@@ -174,20 +176,20 @@ AC_DEFUN(RTEMS_GCC_PIPE,
AC_CACHE_CHECK(whether $CC_FOR_TARGET accepts --pipe,rtems_cv_gcc_pipe,
+if test "$rtems_cv_prog_gcc" = "yes"; then
case "$host_os" in
- rtems_cv_gcc_pipe=no
echo 'void f(){}' >conftest.c
if test -z "`${CC_FOR_TARGET} --pipe -c conftest.c 2>&1`";then
- else
- rtems_cv_gcc_pipe=no
rm -f conftest*
@@ -261,40 +263,174 @@ dnl $Id$
dnl Set target tools
+dnl 98/06/23 Ralf Corsepius (
+dnl fixing cache/environment variable handling
+dnl adding checks for cygwin/egcs '\\'-bug
+dnl adding checks for ranlib/ar -s problem
dnl 98/02/12 Ralf Corsepius (
+[ case $host_os in
+ *cygwin32*)
+ dnl FIXME: Hack for cygwin/egcs reporting mixed '\\' and '/'
+ dnl Should be removed once cygwin/egcs reports '/' only
+ $1=`$CC_FOR_TARGET --print-prog-name=$2 | sed -e "s%\\\\%/%g" `
+ ;;
+ *)
+ $1=`$CC_FOR_TARGET --print-prog-name=$2`
+ ;;
+ esac
+AC_MSG_CHECKING([target's $2])
+if test -n "$ac_cv_path_$1"; then
+ dnl retrieve the value from the cache
+ $1=$ac_cv_path_$1
+ dnl the cache was not set
+ if test -z "[$]$1" ; then
+ if test "$rtems_cv_prog_gcc" = "yes"; then
+ # We are using gcc, ask it about its tool
+ # NOTE: Necessary if gcc was configured to use the target's
+ # native tools or uses prefixes for gnutools (e.g. gas instead of as)
+ fi
+ else
+ # The user set an environment variable.
+ # Check whether it is an absolute path, otherwise AC_PATH_PROG
+ # will override the environment variable, which isn't what the user
+ # intends
+ AC_MSG_CHECKING([whether environment variable $1 is an absolute path])
+ case "[$]$1" in
+ /*) # valid
+ AC_MSG_RESULT("yes")
+ ;;
+ *) # invalid for AC_PATH_PROG
+ AC_MSG_ERROR([***]
+ [Environment variable $1 should ether]
+ [be unset (preferred) or contain an absolute path])
+ ;;
+ esac
+ fi
+ AC_PATH_PROG($1,"$program_prefix"$2,$3)
-if test "$rtems_cv_prog_gcc" = "yes" ; then
- dnl We are using gcc, now ask it about its tools
- dnl Necessary if gcc was configured to use the target's native tools
- dnl or uses prefixes for gnutools (e.g. gas instead of as)
- AR_FOR_TARGET=`$CC_FOR_TARGET --print-prog-name=ar`
- AS_FOR_TARGET=`$CC_FOR_TARGET --print-prog-name=as`
- LD_FOR_TARGET=`$CC_FOR_TARGET --print-prog-name=ld`
- NM_FOR_TARGET=`$CC_FOR_TARGET --print-prog-name=nm`
- RANLIB_FOR_TARGET=`$CC_FOR_TARGET --print-prog-name=ranlib`
+dnl FIXME: What shall be done if these tools are not available?
+dnl special treatment of ranlib
+ if test "$RANLIB_FOR_TARGET" = "no"; then
+ # ranlib wasn't found; check if ar -s is available
+ if test $rtems_cv_AR_FOR_TARGET_S = "yes" ; then
+ dnl override RANLIB_FOR_TARGET's cache
+ else
+ AC_MSG_ERROR([***]
+ [Can't figure out how to build a library index]
+ [Nether ranlib nor ar -s seem to be available] )
+ fi
+ fi
+dnl NOTE: These may not be available if not using gnutools
+AC_CACHE_CHECK(whether $AR_FOR_TARGET -s works,
+cat > conftest.$ac_ext <<EOF
+int foo( int b )
+{ return b; }
+if AC_TRY_COMMAND($CC_FOR_TARGET -o conftest.o -c conftest.$ac_ext) \
+ && AC_TRY_COMMAND($AR_FOR_TARGET -sr conftest.a conftest.o) \
+ && test -s conftest.a ; \
+ rtems_cv_AR_FOR_TARGET_S="yes"
+ rtems_cv_AR_FOR_TARGET_S="no"
+ rm -f conftest*
-dnl check whether the tools exist
-dnl FIXME: What shall be done if they don't exist?
-dnl FIXME: This may fail if the compiler has not been recognized as gcc
-dnl and uses tools with different names
+dnl Detect the Cygwin32 environment (unix under Win32)
+dnl 98/06/16 David Fiddes (
+dnl Hacked from automake-1.3
-dnl NOTE: This is doubtful, but should not disturb all current rtems'
-dnl targets (remark: solaris fakes ranlib!!)
+# Check to see if we're running under Cygwin32, without using
+# AC_CANONICAL_*. If so, set output variable CYGWIN32 to "yes".
+# Otherwise set it to "no".
+[AC_CACHE_CHECK(for Cygwin32 environment, rtems_cv_cygwin32,
+[AC_TRY_COMPILE(,[return __CYGWIN32__;],
+rtems_cv_cygwin32=yes, rtems_cv_cygwin32=no)
+rm -f conftest*])
+test "$rtems_cv_cygwin32" = yes && CYGWIN32=yes])
+dnl Set the EXE extension
+dnl 98/06/16 David Fiddes (
+dnl Hacked from automake-1.3
+# Check to see if we're running under Win32, without using
+# AC_CANONICAL_*. If so, set output variable EXEEXT to ".exe".
+# Otherwise set it to "".
+dnl This knows we add .exe if we're building in the Cygwin32
+dnl environment. But if we're not, then it compiles a test program
+dnl to see if there is a suffix for executables.
+AC_MSG_CHECKING([for executable suffix])
+[if test "$CYGWIN32" = yes; then
+cat > rtems_c_test.c << 'EOF'
+int main() {
+/* Nothing needed here */
+${CC-cc} -o rtems_c_test $CFLAGS $CPPFLAGS $LDFLAGS rtems_c_test.c $LIBS 1>&5
+rtems_cv_exeext=`echo rtems_c_test.* | grep -v rtems_c_test.c | sed -e s/rtems_c_test//`
+rm -f rtems_c_test*])
+test x"${rtems_cv_exeext}" = x && rtems_cv_exeext=no
+test x"${rtems_cv_exeext}" != xno && EXEEXT=${rtems_cv_exeext}
-dnl NOTE: These may not be available, if not using gnutools
dnl $Id$