[OE-core] [PATCH 2/4 V2] Share gcc work directories

[Robert Yang]

This patched is derived from Richard, make gcc use the shared source
directory during the different building:

1) Make gcc-cross, gcc-cross-initial, gcc-cross-intermediate and
   gcc-runtime share the same source directory.

2) The source directory is ${TMPDIR}/work-shared/gcc-${PV}, for example:
   tmp/work-shared/gcc-4.6.0

3) Fix do_clean to clean the shared source directory and stamps

4) gcc uses sed and creates config files against ${S} which means the
   directory should not be shared. Change the way to make it work:
   * The configure option --with-build-sysroot=${STAGING_DIR_TARGET} can
     replace the sed command.

   * Move t-oe from ${T} to ${B}/gcc, so that the patched Makefile.in
     can read it easily, please see the commit for gcc-4.5.1 and
     gcc-4.6.0.

   * Use the defaults.h in ${B}/gcc instead of ${S}/gcc, and the patched
     configure.ac(configure) can read it correctly, please see the
     commit for gcc-4.5.1 and gcc-4.6.0.

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/recipes-devtools/gcc/gcc-common.inc           |   32 +++++++++++++++++-
 meta/recipes-devtools/gcc/gcc-configure-common.inc |   34 +++++++++-----------
 2 files changed, 45 insertions(+), 21 deletions(-)

diff --git a/meta/recipes-devtools/gcc/gcc-common.inc b/meta/recipes-devtools/gcc/gcc-common.inc
index a3fa234..7bf036c 100644
--- a/meta/recipes-devtools/gcc/gcc-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-common.inc
@@ -37,10 +37,38 @@ ${GNU_MIRROR}/gcc/	http://gcc.get-software.com/releases/ \n \
 #
 gcclibdir = "${libdir}/gcc"
 BINV = "${PV}"
-S = "${WORKDIR}/gcc-${PV}"
-B = "${S}/build.${HOST_SYS}.${TARGET_SYS}"
+#S = "${WORKDIR}/gcc-${PV}"
+S = "${TMPDIR}/work-shared/gcc-${PV}/gcc-${PV}"
+B = "${WORKDIR}/gcc-${PV}/build.${HOST_SYS}.${TARGET_SYS}"
+
+# SS means Shared Stamps directory
+SS = "${TMPDIR}/stamps/work-shared/gcc-${PV}"
+do_fetch[stamp-base] = "${SS}"
+do_unpack[stamp-base] = "${SS}"
+do_patch[stamp-base] = "${SS}"
+
+# SW means Shared Work directory
+SW = "${TMPDIR}/work-shared/gcc-${PV}"
+WORKDIR_task-unpack = "${SW}"
+WORKDIR_task-patch = "${SW}"
 
 target_includedir ?= "${includedir}"
 target_libdir ?= "${libdir}"
 target_base_libdir ?= "${base_libdir}"
 target_prefix ?= "${prefix}"
+
+CLEANFUNCS += "workshared_clean"
+# The do_clean should be exclusive since share ${S}
+do_clean[lockfiles] = "${TMPDIR}/stamps/work-shared/gcc-${PV}.clean.lock"
+
+python workshared_clean () {
+	"""clear the source directory"""
+	dir = bb.data.expand("${SW}", d)
+	bb.note("Removing " + dir)
+	oe.path.remove(dir)
+
+	"""clear the the stamps in work-shared"""
+	dir = "%s.*" % bb.data.expand(d.getVarFlag('do_fetch', 'stamp-base', True), d)
+	bb.note("Removing " + dir)
+	oe.path.remove(dir)
+}
diff --git a/meta/recipes-devtools/gcc/gcc-configure-common.inc b/meta/recipes-devtools/gcc/gcc-configure-common.inc
index f7b5836..4cb826c 100644
--- a/meta/recipes-devtools/gcc/gcc-configure-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-configure-common.inc
@@ -29,6 +29,7 @@ GCCMULTILIB = "--disable-multilib"
 
 EXTRA_OECONF = "${@['--enable-clocale=generic', ''][bb.data.getVar('USE_NLS', d, 1) != 'no']} \
                 --with-gnu-ld \
+                --with-build-sysroot=${STAGING_DIR_TARGET} \
                 --enable-shared \
                 --enable-languages=${LANGUAGES} \
                 --enable-threads=posix \
@@ -88,25 +89,20 @@ do_configure () {
 	(cd ${S} && gnu-configize) || die "failure running gnu-configize"
 	
 	# teach gcc to find correct target includedir when checking libc ssp support
-	sed -i 's:^\([ 	]*\)glibc_header_dir=\"${with_build_sysroot}/usr/include\":\1glibc_header_dir=\"${with_build_sysroot}${SYSTEMHEADERS}\":g' ${S}/gcc/configure.ac
-	sed -i 's:^\([ 	]*\)glibc_header_dir=\"${with_build_sysroot}/usr/include\":\1glibc_header_dir=\"${with_build_sysroot}${SYSTEMHEADERS}\":g' ${S}/gcc/configure
-
-	# splice our idea of where the headers live into gcc's world
-	echo "NATIVE_SYSTEM_HEADER_DIR = ${SYSTEMHEADERS}" > ${T}/t-oe
-	sed 's%^tmake_file=.*$%& ${T}/t-oe%' < ${S}/gcc/Makefile.in >${S}/gcc/Makefile.in.new
-	mv ${S}/gcc/Makefile.in.new ${S}/gcc/Makefile.in
-	cat ${S}/gcc/defaults.h | grep -v "\#endif.*GCC_DEFAULTS_H" > ${S}/gcc/defaults.h.new
-	echo "#ifndef STANDARD_INCLUDE_DIR" >> ${S}/gcc/defaults.h.new
-	echo "#define STANDARD_INCLUDE_DIR \"${SYSTEMHEADERS}\"" >> ${S}/gcc/defaults.h.new
-	echo "#endif" >> ${S}/gcc/defaults.h.new
-	echo "#ifndef STANDARD_STARTFILE_PREFIX_1" >> ${S}/gcc/defaults.h.new
-	echo "#define STANDARD_STARTFILE_PREFIX_1 \"${SYSTEMLIBS}\"" >> ${S}/gcc/defaults.h.new
-	echo "#endif" >> ${S}/gcc/defaults.h.new
-	echo "#ifndef STANDARD_STARTFILE_PREFIX_2" >> ${S}/gcc/defaults.h.new
-	echo "#define STANDARD_STARTFILE_PREFIX_2 \"${SYSTEMLIBS1}\"" >> ${S}/gcc/defaults.h.new
-	echo "#endif" >> ${S}/gcc/defaults.h.new
-	echo "#endif /* ! GCC_DEFAULTS_H */" >> ${S}/gcc/defaults.h.new
-	mv ${S}/gcc/defaults.h.new ${S}/gcc/defaults.h
+	mkdir -p ${B}/gcc
+	echo "NATIVE_SYSTEM_HEADER_DIR = ${SYSTEMHEADERS}" > ${B}/gcc/t-oe
+	cat ${S}/gcc/defaults.h | grep -v "\#endif.*GCC_DEFAULTS_H" > ${B}/gcc/defaults.h.new
+	echo "#ifndef STANDARD_INCLUDE_DIR" >> ${B}/gcc/defaults.h.new
+	echo "#define STANDARD_INCLUDE_DIR \"${SYSTEMHEADERS}\"" >> ${B}/gcc/defaults.h.new
+	echo "#endif" >> ${B}/gcc/defaults.h.new
+	echo "#ifndef STANDARD_STARTFILE_PREFIX_1" >> ${B}/gcc/defaults.h.new
+	echo "#define STANDARD_STARTFILE_PREFIX_1 \"${SYSTEMLIBS}\"" >> ${B}/gcc/defaults.h.new
+	echo "#endif" >> ${B}/gcc/defaults.h.new
+	echo "#ifndef STANDARD_STARTFILE_PREFIX_2" >> ${B}/gcc/defaults.h.new
+	echo "#define STANDARD_STARTFILE_PREFIX_2 \"${SYSTEMLIBS1}\"" >> ${B}/gcc/defaults.h.new
+	echo "#endif" >> ${B}/gcc/defaults.h.new
+	echo "#endif /* ! GCC_DEFAULTS_H */" >> ${B}/gcc/defaults.h.new
+	mv ${B}/gcc/defaults.h.new ${B}/gcc/defaults.h
 	oe_runconf
 }
 
-- 
1.7.1