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Subject:	Error while building GMP on cygwin "configure: error: could not find a working compiler"
From:	"Hari Narasimhan H.N" <hari DOT narasimhanhn AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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Hi,

I got the following error in configuring GMP while building a bare
metal GNU cross toolchain for Xtensa on cygwin

configure: error: could not find a working compiler, see config.log for details

The build was performed using a crosstool-NG downloaded from the site
http://wiki.linux-xtensa.org/index.php/Crosstool-NG using the git
clone git clone https://github.com/foss-xtensa/crosstool-NG.git

This downloads GMP-5.1.1 while downloading GCC and related packages.

1. Build environment - cygwin

2. The GMP version number - GMP-5.1.1

3. Output of gcc -v

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-pc-cygwin/4.9.3/lto-wrapper.exe
Target: i686-pc-cygwin
Configured with:
/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.i686/src/gcc-4.9.3/configure
--srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.i686/src/gcc-4.9.3
--prefix=/usr --exec-prefix=/usr --localstatedir=/var
--sysconfdir=/etc --docdir=/usr/share/doc/gcc
--htmldir=/usr/share/doc/gcc/html -C --build=i686-pc-cygwin
--host=i686-pc-cygwin --target=i686-pc-cygwin
--without-libiconv-prefix --without-libintl-prefix
--libexecdir=/usr/lib --enable-shared --enable-shared-libgcc
--enable-static --enable-version-specific-runtime-libs
--enable-bootstrap --enable-__cxa_atexit --with-dwarf2
--with-arch=i686 --with-tune=generic --disable-sjlj-exceptions
--enable-languages=ada,c,c++,fortran,java,lto,objc,obj-c++
--enable-graphite --enable-threads=posix --enable-libatomic
--enable-libgomp --disable-libitm --enable-libquadmath
--enable-libquadmath-support --enable-libssp --enable-libada
--enable-libjava --enable-libgcj-sublibs --disable-java-awt
--disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld
--with-gnu-as --with-cloog-include=/usr/include/cloog-isl
--without-libiconv-prefix --without-libintl-prefix --with-system-zlib
--enable-linker-build-id
Thread model: posix
gcc version 4.9.3 (GCC)


4. The output from running ‘uname -a’.

$ uname -a
CYGWIN_NT-6.1 si-hnhari 2.1.0(0.287/5/3) 2015-07-14 21:26 i686 Cygwin

The output of config.log and build.log is attached.

Please let me know if you need any more information.

Thanks and Regards,
Hari

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