gmp @6.0.0: error: could not find a working compiler, see config.log for details

[ryandesign (Ryan Carsten Schmidt)]

Trying to upgrade gmp universal fails at configuring the i386 part:

:info:configure --->  Configuring gmp for architecture i386
:debug:configure Environment: 
ABI='32'
CC='ccache /usr/bin/clang'
CC_PRINT_OPTIONS='YES'
CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_Users_rschmidt_macports_dports_devel_gmp/gmp/work/.CC_PRINT_OPTIONS'
CFLAGS='-isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
CPATH='/opt/local/include'
CPPFLAGS='-I/opt/local/include -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
CXX='ccache /usr/bin/clang++ -stdlib=libc++'
CXXFLAGS='-isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
F90FLAGS='-Os'
FCFLAGS='-Os'
FFLAGS='-Os'
INSTALL='/usr/bin/install -c'
LDFLAGS='-L/opt/local/lib -Wl,-headerpad_max_install_names -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
LIBRARY_PATH='/opt/local/lib'
MACOSX_DEPLOYMENT_TARGET='10.9'
NM='/usr/bin/nm'
OBJC='ccache /usr/bin/clang'
OBJCFLAGS='-Os -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
OBJCXX='ccache /usr/bin/clang++'
OBJCXXFLAGS='-Os -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'
:debug:configure Assembled command: 'cd "/opt/local/var/macports/build/_Users_rschmidt_macports_dports_devel_gmp/gmp/work/gmp-6.0.0-i386" && ./configure --prefix=/opt/local --enable-cxx'
:debug:configure Executing command line:  cd "/opt/local/var/macports/build/_Users_rschmidt_macports_dports_devel_gmp/gmp/work/gmp-6.0.0-i386" && ./configure --prefix=/opt/local --enable-cxx 
:info:configure checking build system type... coreisbr-apple-darwin13.1.0
:info:configure checking host system type... coreisbr-apple-darwin13.1.0
:info:configure checking for a BSD-compatible install... /usr/bin/install -c
:info:configure checking whether build environment is sane... yes
:info:configure checking for a thread-safe mkdir -p... /opt/local/bin/gmkdir -p
:info:configure checking for gawk... gawk
:info:configure checking whether make sets $(MAKE)... yes
:info:configure checking whether to enable maintainer-specific portions of Makefiles... no
:info:configure checking ABI=32
:info:configure checking whether ccache /usr/bin/clang is gcc... yes
:info:configure checking compiler ccache /usr/bin/clang -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -I/opt/local/include -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk... yes
:info:configure checking compiler ccache /usr/bin/clang -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk has sizeof(long)==4... no
:info:configure configure: error: could not find a working compiler, see config.log for details
:info:configure Command failed:  cd "/opt/local/var/macports/build/_Users_rschmidt_macports_dports_devel_gmp/gmp/work/gmp-6.0.0-i386" && ./configure --prefix=/opt/local --enable-cxx 
:info:configure Exit code: 1

config.log says:

configure:6840: checking compiler ccache /usr/bin/clang -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk has sizeof(long)==4
configure:6853: ccache /usr/bin/clang -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -c conftest.c >&5
conftest.c:4:26: error: 'test_array' declared as an array with a negative size
  static int test_array [1 - 2 * (long) (sizeof (long) != 4)];
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
configure:6856: $? = 1
configure:6861: result: no
configure:6903: error: could not find a working compiler, see config.log for details

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

There is another bug report (#36704) that indicates that ccache may be a problem when used with gmp.
Without it, does the compile succeed?

[ryandesign (Ryan Carsten Schmidt)]

main.log without ccache

[ryandesign (Ryan Carsten Schmidt)]

i386 config.log without ccache

[ryandesign (Ryan Carsten Schmidt)]

No change without ccache; I attached logfiles.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

CFLAGS and CXXFLAGS must be empty when configure is run.
As best I can tell, the problem is:

CFLAGS='-isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk'

Could you please try the attached patch to see if it works in clearing CFLAGS.

[ryandesign (Ryan Carsten Schmidt)]

Ah, that would be because I'm using the patch from #41783.

[nerdling (Jeremy Lavergne)]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

Thanks, yes, that works. I used the slightly different patch that I've attached: no space between -isysroot and its value, no quotes around it, and no revision increase.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

Fixed in r118841.

[cooljeanius (Eric Gallager)]

Cc Me!

[jeremyhu (Jeremy Huddleston Sequoia)]

This causes the -isysroot line to be baked into gmp.h, which we don't want.

[jeremyhu (Jeremy Huddleston Sequoia)]

Followup in #49801