target/7832: libc not found when linking libgcc.so

target/7832: libc not found when linking libgcc.so

[mhabets]

>Number:         7832
>Category:       target
>Synopsis:       libc not found when linking libgcc.so
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Sep 04 20:46:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Martin Habets
>Release:        3.2 20020809 (prerelease)
>Organization:
>Environment:
System: SunOS rtrsun8 5.8 Generic_108528-11 sun4u sparc SUNW,UltraSPARC-IIi-cEngine
Architecture: sun4

	
host: sparc-sun-solaris2.8
build: sparc-sun-solaris2.8
target: powerpc-ibm-linux-gnu
configured with: ./configure --target=powerpc-ibm-linux-gnu --prefix=$HOME/sparc-SunOS_5.8 --exec-prefix=$HOME/sparc-SunOS_5.8 --disable-nls
>Description:
	After configure did a
		make LANGUAGES=c 
	which worked fine. Then did
		make install
	which gave the following error:

/home/mhabets/src/gcc-3.2-20020809/gcc/xgcc -B/home/mhabets/src/gcc-3.2-20020809/gcc/ -B/home/mhabets/sparc-SunOS_5.8/powerpc-ibm-linux-gnu/bin/ -B/home/mhabets/sparc-SunOS_5.8/powerpc-ibm-linux-gnu/lib/ -isystem /home/mhabets/sparc-SunOS_5.8/powerpc-ibm-linux-gnu/include -O2  -DIN_GCC -DCROSS_COMPILE   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -shared -nodefaultlibs -Wl,--soname=libgcc_s.so.1 -Wl,--version-script=libgcc/./libgcc.map -o libgcc_s.so.1  -fPIC -mstrict-align  libgcc/./_muldi3.o libgcc/./_negdi2.o libgcc/./_lshrdi3.o libgcc/./_ashldi3.o libgcc/./_ashrdi3.o libgcc/./_ffsdi2.o libgcc/./_clz.o libgcc/./_cmpdi2.o libgcc/./_ucmpdi2.o libgcc/./_floatdidf.o libgcc/./_floatdisf.o libgcc/./_fixunsdfsi.o libgcc/./_fixunssfsi.o libgcc/./_fixunsdfdi.o libgcc/./_fixdfdi.o libgcc/./_fixunssfdi.o libgcc/./_fixsfdi.o libgcc/./_fixxfdi.o libgcc/./_fixunsx!
fdi.o \
libgcc/./_unpack_df.o libgcc/./_addsub_df.o libcc/./_mul_df.o libgcc/./_div_df.o libgcc/./_fpcmp_parts_df.o libgcc/./_compare_df.o libgcc/./_eq_df.o libgcc/./_ne_df.o libgcc/./_gt_df.o libgcc/./_ge_df.o libgcc/./_lt_df.o libgcc/./_le_df.o libgcc/./_unord_df.o libgcc/./_si_to_df.o libgcc/./_df_to_si.o libgcc/./_negate_df.o libgcc/./_make_df.o libgcc/./_df_to_sf.o libgcc/./_thenan_df.o libgcc/./_df_to_usi.o libgcc/./_usi_to_df.o libgcc/./tramp.o  libgcc/./unwind-dw2.o libgcc/./unwind-dw2-fde-glibc.o libgcc/./unwind-sjlj.o \
 -lc && rm -f libgcc_s.so && ln -s libgcc_s.so.1 libgcc_s.so
/home/mhabets/sparc-SunOS_5.8/powerpc-ibm-linux-gnu/bin/ld: cannot find /lib/libc.so.6
collect2: ld returned 1 exit status
make[2]: *** [libgcc_s.so] Error 1
make[2]: Leaving directory `/home/mhabets/src/gcc-3.2-20020809/gcc'
make[1]: *** [stmp-multilib] Error 2
make[1]: Leaving directory `/home/mhabets/src/gcc-3.2-20020809/gcc'
make: *** [install-gcc] Error 2

	Quite logical, as my host machine does not have /lib/libc.so.6.
	I removed the '-lc' and the build worked fine. The Makefile uses SHLIB_LC for '-lc'
	Looking into Changlog I noticed:
	
2002-03-29  Loren J. Rittle  <ljrittle@acm.org>

        * config.gcc (*-*-freebsd*): Enable creation of libgcc_s.so.
        * config/t-slibgcc-elf-ver (SHLIB_LC): Add macro and use it.
        No functional change except ...
        * config/t-slibgcc-nolc-override (SHLIB_LC): Override it.  New file.
        * doc/install.texi (*-*-freebsd*): Document port configuration.

>How-To-Repeat:
	I think this can be reproduced when building any cross-compiler 
	other than for the *-*-freebsd* target.

>Fix:
	For my specific target the workaround is to change gcc/config.gcc:
	2860c2860
	>       tmake_file="rs6000/t-ppcos t-slibgcc-elf-ver t-slibgcc-nolc-override t-linux rs6000/t-ppccomm"
	---
	<       tmake_file="rs6000/t-ppcos t-slibgcc-elf-ver t-linux rs6000/t-ppccomm"
	
	But it seems to me that the default case should remain NOT to use libc, like it
	was before. This would require changing t-slibgcc-elf-ver and creating
	a t-slibgcc-lc-override.
>Release-Note:
>Audit-Trail:
>Unformatted: