[PATCH] libunwind: force gcc to be built first

[Thilo Fromm <t.fromm@dresearch.de>]

libunwind causes cross gcc build to fail if libunwind is built first:

...
| arm-angstrom-linux-gnueabi-gcc -march=armv5te -mtune=arm926ej-s -mthumb-interwork -mno-thumb -march=armv5te -mtune=arm926ej-s -mthumb-interwork -mno-thumb -isystem/SCRATCH/maniac/oe-merge-test/OE/tmp.6/sysroots/armv5te-angstrom-linux-gnueabi/usr/include -g -Os -O2 -g -Os -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc -I/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc -I/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/. -I/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc -I/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../include  -DHAVE_CC_TLS -o _ucmpdi2_s.o -MT _ucmpdi2_s.o
  \
  -MD -MP -MF _ucmpdi2_s.dep -DSHARED -DL_ucmpdi2 -c /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/libgcc2.c
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/unwind-arm.c:40: error: expected ')' before '*' token
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/unwind-arm.c:41: error: expected ')' before '*' token
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/unwind-arm.c:42: error: expected ')' before '*' token
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/unwind-arm.c:47: warning: data definition has no type or storage class
...

| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/pr-support.c:396: error: expected '=', ',', ';', 'asm' or '__attribute__' before '_Unwind_GetDataRelBase'
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/config/arm/pr-support.c:402: error: expected '=', ',', ';', 'asm' or '__attribute__' before '_Unwind_GetTextRelBase'
| make[2]: *** [unwind-arm.o] Error 1
| make[2]: *** Waiting for unfinished jobs....
| make[2]: *** [pr-support.o] Error 1
...

| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/unwind-c.c:212: error: 'lsda_header_info' has no member named 'LPStart'
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/unwind-c.c:214: error: 'lsda_header_info' has no member named 'action_table'
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/unwind-c.c:234: error: expected ')' before 'ue_header'
| /SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/libgcc/../gcc/unwind-c.c:123: warning: unused parameter 'ue_header'
| make[2]: *** [unwind-c.o] Error 1
| make[2]: Leaving directory `/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/build.arm-angstrom-linux-gnueabi.arm-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi/libgcc'
| make[1]: *** [all-target-libgcc] Error 2
| make[1]: Leaving directory `/SCRATCH/maniac/oe-merge-test/OE/tmp.6/work/armv5te-angstrom-linux-gnueabi/gcc-4.3.3-r17.1/gcc-4.3.3/build.arm-angstrom-linux-gnueabi.arm-angstrom-linux-gnueabi'
| make: *** [all] Error 2
| FATAL: oe_runmake failed
| ERROR: Function do_compile failed
NOTE: package gcc-4.3.3-r17.1: task do_compile: Failed

It looks like libunwind provides header files that are named
identically to gcc header files. gcc then confuses these headers when it
is built, causing a break of the build.

This patch makes libunwind depend on gcc which resolves the build issue. Both
build nicely when gcc is built first.

Signed-off-by: Thilo Fromm <t.fromm@dresearch.de>
---
 recipes/libunwind/libunwind.inc |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/recipes/libunwind/libunwind.inc b/recipes/libunwind/libunwind.inc
index 6994095..4340192 100644
--- a/recipes/libunwind/libunwind.inc
+++ b/recipes/libunwind/libunwind.inc
@@ -1,7 +1,8 @@
 DESCRIPTION = "a portable and efficient C programming interface (API) to determine the call-chain of a program"
 HOMEPAGE = "http://www.nongnu.org/libunwind"
 LICENSE = "MIT"
-INC_PR = "r1"
+INC_PR = "r2"
+DEPENDS = "gcc"
 
 SRC_URI = "http://download.savannah.nongnu.org/releases/${BPN}/${BPN}-${PV}.tar.gz;name=archive"
 
-- 
1.7.0.4