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On Wed, Jul 16, 2008 at 10:32:28AM +0300, Dmitri Vorobiev wrote:
The linux-mips.org Web site recommends gcc 3.4.4 to build the MIPS kernel. However:
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[dmitri.vorobiev@amber linux-2.6]$ mips-unknown-linux-gnu-gcc -v
Reading specs from /home/dmitri.vorobiev/Projects/misc/zoo/lib/gcc/mips-unknown-linux-gnu/3.4.4/specs
Configured with: ../src/gcc-3.4.4/configure --prefix=/home/dmitri.vorobiev/Projects/misc/zoo --target=mips-unknown-linux-gnu --disable-nls --without-headers --with-gnu-ld --with-gnu-as --disable-shared --disable-threads
Thread model: single
gcc version 3.4.4
[dmitri.vorobiev@amber linux-2.6]$ make ARCH=mips CROSS_COMPILE=mips-unknown-linux-gnu-
CHK include/linux/version.h
CHK include/linux/utsrelease.h
CALL scripts/checksyscalls.sh
CC init/main.o
include/asm/bitops.h: In function `start_kernel:
include/asm/bitops.h:76: warning: asm operand 2 probably doesnt match constraints
include/asm/bitops.h:76: warning: asm operand 2 probably doesnt match constraints
include/asm/bitops.h:76: warning: asm operand 2 probably doesnt match constraints
include/asm/bitops.h:76: error: impossible constraint in `asm
include/asm/bitops.h:76: error: impossible constraint in `asm
include/asm/bitops.h:76: error: impossible constraint in `asm
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2
[dmitri.vorobiev@amber linux-2.6]$
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Kernel build goes smoothly for me with this gcc version:
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[dmitri.vorobiev@amber linux-2.6]$ mips-unknown-linux-gnu-gcc -v
Using built-in specs.
Target: mips-unknown-linux-gnu
Configured with: ../gcc-4.3.0/configure --target=mips-unknown-linux-gnu --disable-nls --disable-threads --disable-shared --disable-multilib --disable-libmudflap --disable-libssp --prefix=/home/dmitri.vorobiev/Projects/misc/zoo/4.3-toolchain --with-gmp=/home/dmitri.vorobiev/Projects/misc/zoo/ --with-mfpr=/home/dmitri.vorobiev/Projects/misc/zoo --without-headers --with-gnu-as=/tmp/cross/ --with-gnu-ld=/tmp/cross/ --disable-libgcc --enable-languages=c --disable-libgomp
Thread model: single
gcc version 4.3.0 (GCC)
[dmitri.vorobiev@amber linux-2.6]$
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What I would like to know is which gcc/binutils versions are currently the blessed ones. Thanks.
Anything from gcc 3.2 to 4.3 is supposed to work for 32-bit kernels; 3.3
to 4.3 are the blessed ones for 64-bit kernels.
Ill look into that build problem ... hmm... First thing Im hitting
with 3.4.6 and binutils 2.18 is:
[ralf@denk linux-mips]$ make malta_defconfig
[ralf@denk linux-mips]$ nice -19 make
cc1: error: unrecognized command line option "-fno-stack-protector"
scripts/kconfig/conf -s arch/mips/Kconfig
cc1: error: unrecognized command line option "-fno-stack-protector"
With the offending line in the main Makefile commented out I get the same
error messages as you. Initial fix below.
Ralf
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h
index 9a7274b..49df8c4 100644
--- a/include/asm-mips/bitops.h
+++ b/include/asm-mips/bitops.h
@@ -82,7 +82,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
"2: b 1b
"
" .previous
"
: "=&r" (temp), "=m" (*m)
- : "i" (bit), "m" (*m), "r" (~0));
+ : "ir" (bit), "m" (*m), "r" (~0));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (cpu_has_llsc) {
__asm__ __volatile__(
@@ -147,7 +147,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
"2: b 1b
"
" .previous
"
: "=&r" (temp), "=m" (*m)
- : "i" (bit), "m" (*m));
+ : "ir" (bit), "m" (*m));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (cpu_has_llsc) {
__asm__ __volatile__(
@@ -428,7 +428,7 @@ static inline int test_and_clear_bit(unsigned long nr,
"2: b 1b
"
" .previous
"
: "=&r" (temp), "=m" (*m), "=&r" (res)
- : "i" (bit), "m" (*m)
+ : "ir" (bit), "m" (*m)
: "memory");
#endif
} else if (cpu_has_llsc) {
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