Build failure when cross-compiling with --disable-assembly for some architectures

[Brett Neumeier]

Good afternoon GMP developers!

(Looking at the "reporting bugs" section of the manual, I think I'm
including all the requested information. If I've missed something, please
let me know!)

GMP version: 6.0.0a

Description:  When cross-compiling GMP, with an x86_64 build server and a
variety of target platforms, the build fails for some target architectures
(ARM, sparc) when GMP is configured with --disable-assembly. Other
architectures (at least MIPS) work fine regardless of --disable-assembly.

The specific build failure encountered with the ARM --disable-assembly
build is:

-------- make output begins--------
/bin/bash ../libtool --tag=CC   --mode=compile arm-cbl-linux-gnueabihf-gcc
-DHAVE_CONFIG_H -I. -I.. -D__GMP_WITHIN_GMP -I.. -DOPERATION_`echo
div_qr_1n_pi1 | sed 's/_$//'`    -I/tmp/cblwork/sysroot/bootstrap/include
-DNO_ASM -c -o div_qr_1n_pi1.lo div_qr_1n_pi1.c
libtool: compile:  arm-cbl-linux-gnueabihf-gcc -DHAVE_CONFIG_H -I. -I..
-D__GMP_WITHIN_GMP -I.. -DOPERATION_div_qr_1n_pi1
-I/tmp/cblwork/sysroot/bootstrap/include -DNO_ASM -c div_qr_1n_pi1.c  -fPIC
-DPIC -o .libs/div_qr_1n_pi1.o
div_qr_1n_pi1.c: In function '__gmpn_div_qr_1n_pi1':
div_qr_1n_pi1.c:140:49: error: expected ':' or ')' before '__CLOBBER_CC'
     : "r" (ah), "rI" (bh), "%r" (al), "rI" (bl) __CLOBBER_CC)
                                                 ^
div_qr_1n_pi1.c:218:3: note: in expansion of macro 'add_mssaaaa'
   add_mssaaaa (u2, u1, u0, u0, up[n-2], p1, p0);
   ^
div_qr_1n_pi1.c:140:49: error: expected ':' or ')' before '__CLOBBER_CC'
     : "r" (ah), "rI" (bh), "%r" (al), "rI" (bl) __CLOBBER_CC)
                                                 ^
div_qr_1n_pi1.c:256:7: note: in expansion of macro 'add_mssaaaa'
       add_mssaaaa (u2, u1, u0, u0, up[j], p1, p0);
       ^
Makefile:409: recipe for target 'div_qr_1n_pi1.lo' failed
make[2]: *** [div_qr_1n_pi1.lo] Error 1
make[2]: Leaving directory '/tmp/build/gmp-6.0.0/mpn'
-------- make output ends--------


Configure options:
* ./configure --build=x86_64-unknown-linux-gnu
--host=arm-cbl-linux-gnueabihf --target=arm-cbl-linux-gnueabihf
--enable-cxx --disable-assembly (fails with output above)
* ./configure --build=x86_64-unknown-linux-gnu
--host=arm-cbl-linux-gnueabihf --target=arm-cbl-linux-gnueabihf
--enable-cxx (succeeds)
* ./configure --build=x86_64-unknown-linux-gnu --host=mipsel-cbl-linux-gnu
--target=mipsel-cbl-linux-gnu --enable-cxx --disable-assembly (succeeds)
* ./configure --build=x86_64-unknown-linux-gnu --host=mipsel-cbl-linux-gnu
--target=mipsel-cbl-linux-gnu --enable-cxx (succeeds)

I'm attaching the output from the four separate "configure" runs, along
with the output of "make" for the failed build.

"arm-cbl-linux-gnueabihf-gcc -v" reports:
Reading specs from
/tmp/cblwork/cross-tools/lib/gcc/arm-cbl-linux-gnueabihf/5.2.1/specs
COLLECT_GCC=arm-cbl-linux-gnueabihf-g++
COLLECT_LTO_WRAPPER=/tmp/cblwork/cross-tools/libexec/gcc/arm-cbl-linux-gnueabihf/5.2.1/lto-wrapper
Target: arm-cbl-linux-gnueabihf
Configured with: /tmp/build/gcc-5.2.0/configure
--prefix=/tmp/cblwork/cross-tools --build=x86_64-unknown-linux-gnu
--host=x86_64-unknown-linux-gnu --target=arm-cbl-linux-gnueabihf
--with-sysroot=/tmp/cblwork/sysroot
--with-build-sysroot=/tmp/cblwork/sysroot --disable-multilib --disable-nls
--disable-libquadmath --enable-languages=c,c++ --enable-__cxa_atexit
--enable-shared --enable-c99 --enable-long-long --enable-threads=posix
--with-native-system-header-dir=/bootstrap/include
Thread model: posix
gcc version 5.2.1 20150901 (GCC)

"mipsel-cbl-linux-gnu-gcc -v" reports:
Reading specs from
/tmp/cblwork/cross-tools/lib/gcc/mipsel-cbl-linux-gnu/5.2.1/specs
COLLECT_GCC=mipsel-cbl-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/tmp/cblwork/cross-tools/libexec/gcc/mipsel-cbl-linux-gnu/5.2.1/lto-wrapper
Target: mipsel-cbl-linux-gnu
Configured with: /tmp/build/gcc-5.2.0/configure
--prefix=/tmp/cblwork/cross-tools --build=x86_64-unknown-linux-gnu
--host=x86_64-unknown-linux-gnu --target=mipsel-cbl-linux-gnu
--with-sysroot=/tmp/cblwork/sysroot
--with-build-sysroot=/tmp/cblwork/sysroot --disable-multilib --disable-nls
--disable-libquadmath --enable-languages=c,c++ --enable-__cxa_atexit
--enable-shared --enable-c99 --enable-long-long --enable-threads=posix
--with-native-system-header-dir=/bootstrap/include
Thread model: posix
gcc version 5.2.1 20150919 (GCC)

"uname -a" reports:
Linux plugh 3.19.3 #1 SMP PREEMPT Sat Apr 4 15:24:49 CDT 2015 x86_64 x86_64
x86_64 GNU/Linux

"./config.guess" reports:
x86_64-unknown-linux-gnu

"./configfsf.guess" reports:
x86_64-unknown-linux-gnu


-- 
Brett Neumeier (bneumeier at gmail.com)
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