6 files changed, 62 insertions, 11 deletions

diff --git a/meta/recipes-core/glibc/glibc.inc b/meta/recipes-core/glibc/glibc.inc
index 43e71337ee..de692fbfd7 100644
--- a/meta/recipes-core/glibc/glibc.inc
+++ b/meta/recipes-core/glibc/glibc.inc
@@ -15,7 +15,7 @@ python () {
         bb.fatal("%s can't be built with %s, try -O1 instead" % (d.getVar('PN'), opt_effective))
 }
 
-DEPENDS = "virtual/${TARGET_PREFIX}gcc-initial libgcc-initial linux-libc-headers"
+DEPENDS = "virtual/${TARGET_PREFIX}gcc libgcc-initial linux-libc-headers"
 
 PROVIDES = "virtual/libc virtual/${TARGET_PREFIX}libc-for-gcc"
 PROVIDES += "virtual/libintl virtual/libiconv"
@@ -33,6 +33,9 @@ CACHED_CONFIGUREVARS += " \
   libc_cv_ssp=no \
 "
 
+# ifunc doesn't appear to work on mips, casuses libbfd assertion failures
+CACHED_CONFIGUREVARS_append_mipsarch = " libc_cv_ld_gnu_indirect_function=no"
+
 GLIBC_EXTRA_OECONF ?= ""
 GLIBC_EXTRA_OECONF_class-nativesdk = ""
 INHIBIT_DEFAULT_DEPS = "1"
diff --git a/meta/recipes-devtools/gcc/gcc-configure-common.inc b/meta/recipes-devtools/gcc/gcc-configure-common.inc
index e2ce234aa1..0eecde6f17 100644
--- a/meta/recipes-devtools/gcc/gcc-configure-common.inc
+++ b/meta/recipes-devtools/gcc/gcc-configure-common.inc
@@ -47,6 +47,10 @@ EXTRA_OECONF = "\
     ${@get_gcc_multiarch_setting(bb, d)} \
 "
 
+# glibc version is a minimum controlling whether features are enabled. 
+# Doesn't need to track glibc exactly
+EXTRA_OECONF_append_libc-glibc = " --with-glibc-version=2.28 "
+
 # Set this here since GCC configure won't auto-detect and enable
 # initfini-arry when cross compiling.
 EXTRA_OECONF_append = " --enable-initfini-array"
diff --git a/meta/recipes-devtools/gcc/gcc-cross-canadian.inc b/meta/recipes-devtools/gcc/gcc-cross-canadian.inc
index 2f32d3407f..73f1e05446 100644
--- a/meta/recipes-devtools/gcc/gcc-cross-canadian.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross-canadian.inc
@@ -3,7 +3,7 @@ inherit cross-canadian
 SUMMARY = "GNU cc and gcc C compilers (cross-canadian for ${TARGET_ARCH} target)"
 PN = "gcc-cross-canadian-${TRANSLATED_TARGET_ARCH}"
 
-DEPENDS = "virtual/${TARGET_PREFIX}gcc virtual/${HOST_PREFIX}gcc-crosssdk virtual/${HOST_PREFIX}binutils-crosssdk virtual/nativesdk-${HOST_PREFIX}libc-for-gcc nativesdk-gettext flex-native"
+DEPENDS = "virtual/${TARGET_PREFIX}gcc virtual/${HOST_PREFIX}gcc-crosssdk virtual/${HOST_PREFIX}binutils-crosssdk virtual/nativesdk-${HOST_PREFIX}libc-for-gcc nativesdk-gettext flex-native virtual/libc"
 
 GCCMULTILIB = "--enable-multilib"
 
diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
index 89b19684be..63a196e2e9 100644
--- a/meta/recipes-devtools/gcc/gcc-cross.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross.inc
@@ -2,7 +2,7 @@ inherit cross
 
 INHIBIT_DEFAULT_DEPS = "1"
 EXTRADEPENDS = ""
-DEPENDS = "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}libc-for-gcc ${EXTRADEPENDS} ${NATIVEDEPS}"
+DEPENDS = "virtual/${TARGET_PREFIX}binutils ${EXTRADEPENDS} ${NATIVEDEPS}"
 PROVIDES = "virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}g++"
 python () {
     if d.getVar("TARGET_OS").startswith("linux"):
@@ -44,6 +44,12 @@ EXTRA_OECONF_PATHS = "\
 
 ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_TARGET}${target_includedir}"
 
+
+do_configure_prepend () {
+        install -d ${RECIPE_SYSROOT}${target_includedir}
+        touch ${RECIPE_SYSROOT}${target_includedir}/limits.h
+}
+
 do_compile () {
         export CC="${BUILD_CC}"
         export AR_FOR_TARGET="${TARGET_SYS}-ar"
diff --git a/meta/recipes-devtools/gcc/libgcc-initial.inc b/meta/recipes-devtools/gcc/libgcc-initial.inc
index 950ad861e7..06bf224f73 100644
--- a/meta/recipes-devtools/gcc/libgcc-initial.inc
+++ b/meta/recipes-devtools/gcc/libgcc-initial.inc
@@ -1,20 +1,58 @@
+#
+# Notes on the way the OE cross toolchain now works
+#
+# We need a libgcc to build glibc. Tranditionally we therefore built
+# a non-threaded and non-shared compiler (gcc-cross-initial), then use
+# that to build libgcc-initial which is used to build glibc which we can
+# then build gcc-cross and libgcc against.
+#
+# We were able to drop the glibc dependency from gcc-cross, with two tweaks:
+
+# a) specify the minimum glibc version to support in a configure option
+# b) create a dummy limits.h file so that later when glibc creates one,
+#    the headers structure has support for it. We can do this with a simple
+#    empty file
+#
+# Once gcc-cross is libc independent, we can use it to build both
+# libgcc-initial and then later libgcc.
+#
+# libgcc-initial is tricky as we need to imitate the non-threaded and
+# non-shared case. We can do that by hacking the threading mode back to
+# "single" even if gcc reports "posix" and disable libc presence for the
+# libgcc-intial build. We have to create the dummy limits.h to avoid
+# compiler errors from a missing header.
+#
+# glibc will fail to link with libgcc-initial due to a missing "exception
+# handler" capable libgcc (libgcc_eh.a). Since we know glibc doesn't need
+# any exception handler, we can safely symlink to libgcc.a.
+#
+
 require libgcc-common.inc
 
-DEPENDS = "virtual/${TARGET_PREFIX}gcc-initial"
+DEPENDS = "virtual/${TARGET_PREFIX}gcc"
 
 LICENSE = "GPL-3.0-with-GCC-exception"
 
-STAGINGCC = "gcc-cross-initial-${TARGET_ARCH}"
-STAGINGCC_class-nativesdk = "gcc-crosssdk-initial-${SDK_SYS}"
-PATH_prepend = "${STAGING_BINDIR_TOOLCHAIN}.${STAGINGCC}:"
-
 PACKAGES = ""
 
 EXTRA_OECONF += "--disable-shared"
 
-COMPILERINITIAL = "-initial"
-
 inherit nopackages
 
 # We really only want this built by things that need it, not any recrdeptask
 deltask do_build
+
+do_configure_prepend () {
+        install -d ${STAGING_INCDIR}
+        touch ${STAGING_INCDIR}/limits.h
+        sed -i -e 's#INHIBIT_LIBC_CFLAGS =.*#INHIBIT_LIBC_CFLAGS = -Dinhibit_libc#' ${B}/gcc/libgcc.mvars
+        sed -i -e 's#inhibit_libc = false#inhibit_libc = true#' ${B}/gcc/Makefile
+}
+
+do_configure_append () {
+        sed -i -e 's#thread_header = .*#thread_header = gthr-single.h#' ${B}/${BPN}/Makefile
+}
+
+do_install_append () {
+        ln -s libgcc.a ${D}${libdir}/${TARGET_SYS}/${BINV}/libgcc_eh.a
+}
diff --git a/meta/recipes-devtools/gcc/libgcc.inc b/meta/recipes-devtools/gcc/libgcc.inc
index 5f1dff609c..e4e0c48007 100644
--- a/meta/recipes-devtools/gcc/libgcc.inc
+++ b/meta/recipes-devtools/gcc/libgcc.inc
@@ -1,6 +1,6 @@
 require libgcc-common.inc
 
-DEPENDS = "virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}g++"
+DEPENDS = "virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}g++ virtual/${MLPREFIX}libc"
 
 do_install_append_class-target () {
         if [ "${TCLIBC}" != "glibc" ]; then