Replace libgcc.a by libcompiler_rt.a.

libcompiler_rt.a is a BSD licensed C language runtime, which implements
many routines which are linked into binaries on architectures where
certain functionality is missing (e.g. 64 bits mul/div on i386).

Unfortunately, libcompiler_rt cannot replace libgcc entirely. Certain
features, such as an unwinder for exception handling, are missing.
That's why only libgcc.a is replaced for now, because this one does seem
to be complete.

Tested by:	rene (amd64), nwhitehorn (powerpc), droso (i386 exprun)
		and many others. Thanks!
Obtained from:	user/ed/compiler-rt

Makefile.inc1

@@ -1123,7 +1123,7 @@ libraries:
 #
 # static libgcc.a prerequisite for shared libc
 #
-_prereq_libs= gnu/lib/libssp/libssp_nonshared gnu/lib/libgcc
+_prereq_libs= gnu/lib/libssp/libssp_nonshared gnu/lib/libgcc lib/libcompiler_rt
 
 # These dependencies are not automatically generated:
 #
@@ -1139,6 +1139,7 @@ _startup_libs+=	lib/csu/${MACHINE_ARCH}
 _startup_libs+=	lib/csu/${MACHINE_CPUARCH}
 .endif
 _startup_libs+=	gnu/lib/libgcc
+_startup_libs+=	lib/libcompiler_rt
 _startup_libs+=	lib/libc
 
 gnu/lib/libgcc__L: lib/libc__L

gnu/lib/libgcc/Makefile

@@ -3,7 +3,6 @@
 GCCDIR=	${.CURDIR}/../../../contrib/gcc
 GCCLIB=	${.CURDIR}/../../../contrib/gcclibs
 
-LIB=		gcc
 SHLIB_NAME=	libgcc_s.so.1
 SHLIBDIR?=	/lib
 

lib/Makefile

@@ -34,6 +34,7 @@ SUBDIR_ORDERED=	${_csu} \
 	libbsm \
 	libauditd \
 	libcom_err \
+	libcompiler_rt \
 	libcrypt \
 	libelf \
 	libkvm \
@@ -53,6 +54,7 @@ SUBDIR=	${SUBDIR_ORDERED} \
 	libarchive \
 	${_libatm} \
 	libbegemot \
+	libblocksruntime \
 	${_libbluetooth} \
 	${_libbsnmp} \
 	libbz2 \

sys/sys/param.h

@@ -58,7 +58,7 @@
  *		in the range 5 to 9.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 900023	/* Master, propagated to newvers */
+#define __FreeBSD_version 900024	/* Master, propagated to newvers */
 
 #ifndef LOCORE
 #include <sys/types.h>