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[patch, libgloss] Create nosys.specs
- From: "Joey Ye" <joey dot ye at arm dot com>
- To: <newlib at sourceware dot org>
- Date: Thu, 12 Sep 2013 23:04:59 +0800
- Subject: [patch, libgloss] Create nosys.specs
- Authentication-results: sourceware.org; auth=none
Bare-metal toolchain users often run into missing libgloss symbols problem.
The typical reason is that -lnosys isn't given in the right place. For
example:
# this works
$ arm-none-eabi-gcc a.o -lc -lnosys -o a.axf
# putting object file at end of option, it doesn't work
$ arm-none-eabi-gcc -lc -lnosys -o a.axf a.o
libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text._sbrk_r+0x12): undefined reference to `_sbrk'
This patch introduces nosys.specs to group -lnosys with -lc, which is quite
similar to rdimon.specs. With this patch, following simple command line will
work:
$ arm-none-eabi-gcc -specs=nosys.specs -o a.axf a.o
OK to trunk?
ChangeLog:
libnosys/Makefile.in: install nosys.specs.
libnosys/nosys.specs: New specs.
diff --git a/libgloss/libnosys/Makefile.in b/libgloss/libnosys/Makefile.in
index ff4c416..22828a4 100644
--- a/libgloss/libnosys/Makefile.in
+++ b/libgloss/libnosys/Makefile.in
@@ -77,6 +77,7 @@ GCC_LDFLAGS = `if [ -d ${objroot}/../gcc ] ; \
then echo -L${objroot}/../gcc ; fi`
OUTPUTS = libnosys.a
+SPECS = ${srcdir}/nosys.specs
# Host specific makefile fragment comes in here.
@host_makefile_frag@
@@ -101,7 +102,7 @@ distclean maintainer-clean realclean: clean
.PHONY: install info install-info clean-info
install:
- @for outputs in ${OUTPUTS}; do\
+ @for outputs in ${OUTPUTS} ${SPECS}; do\
mkdir -p $(DESTDIR)$(tooldir)/lib${MULTISUBDIR}; \
$(INSTALL_DATA) $${outputs} $(DESTDIR)$(tooldir)/lib${MULTISUBDIR};
\
done
diff --git a/libgloss/libnosys/nosys.specs b/libgloss/libnosys/nosys.specs
new file mode 100644
index 0000000..dffc28d
--- /dev/null
+++ b/libgloss/libnosys/nosys.specs
@@ -0,0 +1,7 @@
+%rename lib libc
+
+*libgloss:
+-lnosys
+
+*lib:
+--start-group %(libc) %(libgloss) --end-group