Jack Howarth via llvm-dev
2016-Oct-08 17:33 UTC
[llvm-dev] cmake 3.7.0-rc1 breaks stage2 bootstrap in openmp on 10.11 with Xcode 8
The new cmake 3.7.0-rc1 release produces a stage2 bootstrap failure in
openmp project build on OS X 10.11 under Xcode 8....
In file included from
/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c:16:
In file included from
/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp.h:98:
/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_lock.h:26:10:
fatal error: 'atomic' file not found
#include <atomic>
^
This appears to be due to the new cmake 3.7.0-rc1 resulting in
-isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
being used in the compilation of openmp....
cd /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src
&& /sw/src/fink.build/llvm40-4.0.0-1/opt-bin/cc-st1-clang
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Domp_EXPORTS
-I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src
-I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src
-I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include
-I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include
-I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n
-I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45
-I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify
-Wall -W -Wno-unused-parameter -Wwrite-strings
-Wmissing-field-initializers -pedantic -Wno-long-long
-Wcovered-switch-default -Wdelete-non-virtual-dtor -Werror=date-time
-O3 -DNDEBUG -arch x86_64 -arch i386 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-fPIC -D _GNU_SOURCE -D _REENTRANT -I/sw/include -std=c++11
-fno-exceptions -Wno-sign-compare -Wno-unused-function
-Wno-unused-local-typedef -Wno-unused-value -Wno-unused-variable
-Wno-switch -Wno-covered-switch-default -Wno-deprecated-register
-Wno-gnu-anonymous-struct -Wno-unknown-pragmas
-Wno-missing-field-initializers -Wno-missing-braces -Wno-comment
-Wno-self-assign -Wno-vla-extension -Wno-format-pedantic -x c++ -o
CMakeFiles/omp.dir/kmp_alloc.c.o -c
/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c
The problem doesn't exist under cmake 3.6.2 because the openmp build
doesn't append -isysroot in that case.
Jack
ps Note this seems to be related to using any SDK for -sysroot as
substituting...
-isysroot
/Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
from the Xcode 7.3.1 release also fails but substituting...
-isysroot /
or omitting -sysroot entirely allows the compilation to succeed. So it
seems that the openmp code doesn't like being compiled against SDKs
rather than / on darwin.
Jack Howarth via llvm-dev
2016-Oct-08 18:08 UTC
[llvm-dev] cmake 3.7.0-rc1 breaks stage2 bootstrap in openmp on 10.11 with Xcode 8
On Sat, Oct 8, 2016 at 1:33 PM, Jack Howarth <howarth.mailing.lists at gmail.com> wrote:> The new cmake 3.7.0-rc1 release produces a stage2 bootstrap failure in > openmp project build on OS X 10.11 under Xcode 8.... > > In file included from > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c:16: > In file included from > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp.h:98: > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_lock.h:26:10: > fatal error: 'atomic' file not found > #include <atomic> > ^ >Appending -v to see the header search paths emitted from the compiler shows the following.... compiling without -sysroot (which is the behavior for cmake 3.6.2 and earlier).... clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target x86_64-apple-darwin15.6.0 ignoring nonexistent directory "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" ignoring nonexistent directory "/usr/local/include" #include "..." search starts here: #include <...> search starts here: /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify /sw/include /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include /usr/include /System/Library/Frameworks (framework directory) /Library/Frameworks (framework directory) End of search list. compiling with -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk as cmake 3.7.0-rc1 does... lang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target x86_64-apple-darwin15.6.0 ignoring nonexistent directory "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1" ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/local/include" ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Library/Frameworks" #include "..." search starts here: #include <...> search starts here: /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify /sw/include /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks (framework directory) End of search list. compiling with -isysroot / instead.... clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target x86_64-apple-darwin15.6.0 ignoring nonexistent directory "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" ignoring nonexistent directory "/usr/local/include" #include "..." search starts here: #include <...> search starts here: /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify /sw/include /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include /usr/include /System/Library/Frameworks (framework directory) /Library/Frameworks (framework directory) End of search list. So for both no usage of -sysroot or '-sysroot /', the search path of /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 is appended for the compiler but the case of '-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk', the compiler attempts to use the non-existent search path of /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1.> This appears to be due to the new cmake 3.7.0-rc1 resulting in > -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk > being used in the compilation of openmp.... > > cd /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src > && /sw/src/fink.build/llvm40-4.0.0-1/opt-bin/cc-st1-clang > -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS > -Domp_EXPORTS -I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src > -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src > -I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include > -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include > -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n > -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 > -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify > -Wall -W -Wno-unused-parameter -Wwrite-strings > -Wmissing-field-initializers -pedantic -Wno-long-long > -Wcovered-switch-default -Wdelete-non-virtual-dtor -Werror=date-time > -O3 -DNDEBUG -arch x86_64 -arch i386 -isysroot > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk > -fPIC -D _GNU_SOURCE -D _REENTRANT -I/sw/include -std=c++11 > -fno-exceptions -Wno-sign-compare -Wno-unused-function > -Wno-unused-local-typedef -Wno-unused-value -Wno-unused-variable > -Wno-switch -Wno-covered-switch-default -Wno-deprecated-register > -Wno-gnu-anonymous-struct -Wno-unknown-pragmas > -Wno-missing-field-initializers -Wno-missing-braces -Wno-comment > -Wno-self-assign -Wno-vla-extension -Wno-format-pedantic -x c++ -o > CMakeFiles/omp.dir/kmp_alloc.c.o -c > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c > > The problem doesn't exist under cmake 3.6.2 because the openmp build > doesn't append -isysroot in that case. > Jack > ps Note this seems to be related to using any SDK for -sysroot as > substituting... > > -isysroot /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk > > from the Xcode 7.3.1 release also fails but substituting... > > -isysroot / > > or omitting -sysroot entirely allows the compilation to succeed. So it > seems that the openmp code doesn't like being compiled against SDKs > rather than / on darwin.
Jack Howarth via llvm-dev
2016-Oct-08 18:22 UTC
[llvm-dev] cmake 3.7.0-rc1 breaks stage2 bootstrap in openmp on 10.11 with Xcode 8
On Sat, Oct 8, 2016 at 2:08 PM, Jack Howarth <howarth.mailing.lists at gmail.com> wrote:> On Sat, Oct 8, 2016 at 1:33 PM, Jack Howarth > <howarth.mailing.lists at gmail.com> wrote: >> The new cmake 3.7.0-rc1 release produces a stage2 bootstrap failure in >> openmp project build on OS X 10.11 under Xcode 8.... >> >> In file included from >> /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c:16: >> In file included from >> /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp.h:98: >> /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_lock.h:26:10: >> fatal error: 'atomic' file not found >> #include <atomic> >> ^ >> > > Appending -v to see the header search paths emitted from the compiler > shows the following.... > > compiling without -sysroot (which is the behavior for cmake 3.6.2 and > earlier).... > > clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target > x86_64-apple-darwin15.6.0 > ignoring nonexistent directory > "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" > ignoring nonexistent directory "/usr/local/include" > #include "..." search starts here: > #include <...> search starts here: > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify > /sw/include > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 > /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include > /usr/include > /System/Library/Frameworks (framework directory) > /Library/Frameworks (framework directory) > End of search list. > > compiling with -isysroot > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk > as cmake 3.7.0-rc1 does... > > lang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target > x86_64-apple-darwin15.6.0 > ignoring nonexistent directory > "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" > ignoring nonexistent directory > "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1" > ignoring nonexistent directory > "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/local/include" > ignoring nonexistent directory > "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Library/Frameworks" > #include "..." search starts here: > #include <...> search starts here: > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify > /sw/include > /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks > (framework directory) > End of search list. > > compiling with -isysroot / instead.... > > clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target > x86_64-apple-darwin15.6.0 > ignoring nonexistent directory > "/sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../include/c++/v1" > ignoring nonexistent directory "/usr/local/include" > #include "..." search starts here: > #include <...> search starts here: > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src > /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 > /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify > /sw/include > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 > /sw/src/fink.build/llvm40-4.0.0-1/build/stage1/bin/../lib/clang/4.0.0/include > /usr/include > /System/Library/Frameworks (framework directory) > /Library/Frameworks (framework directory) > End of search list. > > So for both no usage of -sysroot or '-sysroot /', the search path of > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1 > is appended for the compiler but the case of '-isysroot > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk', > the compiler attempts to use the non-existent search path of > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1. >This issue seems to be specific to the llvm.org clang compiler. Using.... clang-4.0 -std=c++11 -x c++ --sysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk test.c -v produces the bad search path of ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1" whereas for the Apple clang 8.0 compiler, the same compilation produces the valid search path of... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1>> This appears to be due to the new cmake 3.7.0-rc1 resulting in >> -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk >> being used in the compilation of openmp.... >> >> cd /sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src >> && /sw/src/fink.build/llvm40-4.0.0-1/opt-bin/cc-st1-clang >> -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS >> -Domp_EXPORTS -I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/projects/openmp/runtime/src >> -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src >> -I/sw/src/fink.build/llvm40-4.0.0-1/build/stage2/include >> -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/include >> -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/i18n >> -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/include/45 >> -I/sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/thirdparty/ittnotify >> -Wall -W -Wno-unused-parameter -Wwrite-strings >> -Wmissing-field-initializers -pedantic -Wno-long-long >> -Wcovered-switch-default -Wdelete-non-virtual-dtor -Werror=date-time >> -O3 -DNDEBUG -arch x86_64 -arch i386 -isysroot >> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk >> -fPIC -D _GNU_SOURCE -D _REENTRANT -I/sw/include -std=c++11 >> -fno-exceptions -Wno-sign-compare -Wno-unused-function >> -Wno-unused-local-typedef -Wno-unused-value -Wno-unused-variable >> -Wno-switch -Wno-covered-switch-default -Wno-deprecated-register >> -Wno-gnu-anonymous-struct -Wno-unknown-pragmas >> -Wno-missing-field-initializers -Wno-missing-braces -Wno-comment >> -Wno-self-assign -Wno-vla-extension -Wno-format-pedantic -x c++ -o >> CMakeFiles/omp.dir/kmp_alloc.c.o -c >> /sw/src/fink.build/llvm40-4.0.0-1/llvm-4.0.0.src/projects/openmp/runtime/src/kmp_alloc.c >> >> The problem doesn't exist under cmake 3.6.2 because the openmp build >> doesn't append -isysroot in that case. >> Jack >> ps Note this seems to be related to using any SDK for -sysroot as >> substituting... >> >> -isysroot /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk >> >> from the Xcode 7.3.1 release also fails but substituting... >> >> -isysroot / >> >> or omitting -sysroot entirely allows the compilation to succeed. So it >> seems that the openmp code doesn't like being compiled against SDKs >> rather than / on darwin.