sh4-pthread.patch

linux下编译交叉工具链的工具源码

See http://gcc.gnu.org/PR11903

Patch to fix following test case failure:

		=== libstdc++-v3 tests ===
FAIL: thread/pthread1.cc (test for excess errors)
Excess errors:
/opt/cegl-2.0/sh4-unknown-linux-gnu/gcc-ss-3_3-20030714-glibc-2.2.5/sh4-unknown-linux-gnu/bin/ld: cannot find -lthread
collect2: ld returned 1 exit status

Note that *any* program compiled with -pthread fails:

/opt/cegl-2.0/sh4-unknown-linux-gnu/gcc-ss-3_3-20030714-glibc-2.2.5/bin/sh4-unknown-linux-gnu-gcc hello.c  -pthread
/opt/cegl-2.0/sh4-unknown-linux-gnu/gcc-ss-3_3-20030714-glibc-2.2.5/lib/gcc-lib/sh4-unknown-linux-gnu/3.3.1/../../../../sh4-unknown-linux-gnu/bin/ld: cannot find -lthread
collect2: ld returned 1 exit status

Compiling with -lpthread on the other hand works fine:
/opt/cegl-2.0/sh4-unknown-linux-gnu/gcc-ss-3_3-20030714-glibc-2.2.5/bin/sh4-unknown-linux-gnu-gcc hello.c  -lpthread

So -pthread is broken in some trivial way; it should invoke -lpthread, not -lthread,
at least when targeting Linux. 

http://www.sh-linux.org/rpm-2003/SRPMS/gcc-3.2.3-3.src.rpm contains a jumbo patch,
gcc-20030210-sh-linux-1.patch, that includes a fix for this.  Here's the
appropriate hunk (brings in a fix for the documented -mieee option).
No idea if this fix is completely right, but it works for me...
- [e-mail]  20 Jul 2003

Index: linux.h
===================================================================
RCS file: /cvsroot/gcc/gcc/gcc/config/sh/linux.h,v
retrieving revision 1.9.20.1
diff -u -d -u -r1.9.20.1 linux.h
--- gcc-ss-3_3-20030714/gcc/config/sh/linux.h.old	6 Jun 2003 02:30:59 -0000	1.9.20.1
+++ gcc-ss-3_3-20030714/gcc/config/sh/linux.h	20 Jul 2003 23:36:50 -0000
@@ -59,7 +59,7 @@
 #undef LIB_SPEC
 #define LIB_SPEC \
   "%{shared: -lc} \
-   %{!shared: %{pthread:-lthread} \
+   %{!shared: %{mieee:-lieee} %{pthread:-lpthread} \
      %{profile:-lc_p} %{!profile: -lc}}"
 
 #undef STARTFILE_SPEC