Hello,
I tried to build the libatomic for RTEMS on ARM and I got this error:
make[2]: Entering directory
`/build/git-build/b-gcc-git-arm-rtems4.12/arm-rtems4.12/thumb/armv6-m/libatomic'
/bin/sh ./libtool --tag=CC --mode=compile
/build/git-build/b-gcc-git-arm-rtems4.12/./gcc/xgcc
-B/build/git-build/b-gcc-git-arm-rtems4.12/./gcc/ -nostdinc
-B/build/git-build/b-gcc-git-arm-rtems4.12/arm-rtems4.12/thumb/armv6-m/newlib/
-isystem
/build/git-build/b-gcc-git-arm-rtems4.12/arm-rtems4.12/thumb/armv6-m/newlib/targ-include
-isystem /home/EB/sebastian_h/archive/gcc-git/newlib/libc/include
-B/opt/rtems-4.12/arm-rtems4.12/bin/
-B/opt/rtems-4.12/arm-rtems4.12/lib/ -isystem
/opt/rtems-4.12/arm-rtems4.12/include -isystem
/opt/rtems-4.12/arm-rtems4.12/sys-include -mthumb -march=armv6-m
-DHAVE_CONFIG_H
-I/home/EB/sebastian_h/archive/gcc-git/libatomic/config/arm
-I/home/EB/sebastian_h/archive/gcc-git/libatomic/config/rtems
-I/home/EB/sebastian_h/archive/gcc-git/libatomic -I. -Wall -Werror
-g -O2 -fno-sync-libcalls -fno-sync-libcalls -MT exch_1_.lo -MD -MP
-MF .deps/exch_1_.lo.Ppo -DN=1 -c -o exch_1_.lo
/home/EB/sebastian_h/archive/gcc-git/libatomic/config/arm/exch_n.c
libtool: compile: /build/git-build/b-gcc-git-arm-rtems4.12/./gcc/xgcc
-B/build/git-build/b-gcc-git-arm-rtems4.12/./gcc/ -nostdinc
-B/build/git-build/b-gcc-git-arm-rtems4.12/arm-rtems4.12/thumb/armv6-m/newlib/
-isystem
/build/git-build/b-gcc-git-arm-rtems4.12/arm-rtems4.12/thumb/armv6-m/newlib/targ-include
-isystem /home/EB/sebastian_h/archive/gcc-git/newlib/libc/include
-B/opt/rtems-4.12/arm-rtems4.12/bin/
-B/opt/rtems-4.12/arm-rtems4.12/lib/ -isystem
/opt/rtems-4.12/arm-rtems4.12/include -isystem
/opt/rtems-4.12/arm-rtems4.12/sys-include -mthumb -march=armv6-m
-DHAVE_CONFIG_H
-I/home/EB/sebastian_h/archive/gcc-git/libatomic/config/arm
-I/home/EB/sebastian_h/archive/gcc-git/libatomic/config/rtems
-I/home/EB/sebastian_h/archive/gcc-git/libatomic -I. -Wall -Werror -g
-O2 -fno-sync-libcalls -fno-sync-libcalls -MT exch_1_.lo -MD -MP -MF
.deps/exch_1_.lo.Ppo -DN=1 -c
/home/EB/sebastian_h/archive/gcc-git/libatomic/config/arm/exch_n.c -o
exch_1_.o
/tmp/ccrU82YJ.s: Assembler messages:
/tmp/ccrU82YJ.s:58: Error: selected processor does not support `uadd8
r3,r3,r3' in Thumb mode
/tmp/ccrU82YJ.s:59: Error: selected processor does not support `ldrex
r2,[r0]' in Thumb mode
/tmp/ccrU82YJ.s:60: Error: selected processor does not support `sel
r3,r1,r2' in Thumb mode
/tmp/ccrU82YJ.s:61: Error: selected processor does not support `strex
r5,r3,[r0]' in Thumb mode
In "libatomic/config/arm/arm-config.h" we have:
#if __ARM_ARCH__ >= 7 || defined(__ARM_ARCH_6K__) ||
defined(__ARM_ARCH_6ZK__)
# define HAVE_STREX 1
# define HAVE_STREXBHD 1
#elif __ARM_ARCH__ == 6
# define HAVE_STREX 1
#endif
Is there a particular reason why this file uses __ARM_ARCH_* and not
directly __ARM_FEATURE_LDREX?
The following patch would fix the build problem:
diff --git a/libatomic/config/arm/arm-config.h
b/libatomic/config/arm/arm-config.h
index 19331e3..79f422f 100644
--- a/libatomic/config/arm/arm-config.h
+++ b/libatomic/config/arm/arm-config.h
@@ -68,7 +68,7 @@
#if __ARM_ARCH__ >= 7 || defined(__ARM_ARCH_6K__) ||
defined(__ARM_ARCH_6ZK__)
# define HAVE_STREX 1
# define HAVE_STREXBHD 1
-#elif __ARM_ARCH__ == 6
+#elif __ARM_ARCH__ == 6 && !defined(__ARM_ARCH_6M__)
# define HAVE_STREX 1
#endif
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
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