<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body><div style="font-family:Helvetica,Arial;font-size:13px; ">Hello people, </div><div style="font-family:Helvetica,Arial;font-size:13px; "><br></div><div style="font-family:Helvetica,Arial;font-size:13px; ">I saw this kind of errors quite often lately around. But this times I’m hitting this with a local project, not a port in Macports. A project that used to build correctly with Xcode 10, now it seems to miss stuff in <cmath> header.</div><div style="font-family:Helvetica,Arial;font-size:13px; "><br></div><div style="font-family:Helvetica,Arial;font-size:13px; "><div style="margin: 0px;">ninja -j 1</div><div style="margin: 0px;">[1/48] Building CXX object src/libs/CMakeFiles/Mercurve.dir/BlockMerger.cxx.o</div><div style="margin: 0px;">FAILED: src/libs/CMakeFiles/Mercurve.dir/BlockMerger.cxx.o</div><div style="margin: 0px;">/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -DMercurve_EXPORTS -I../src/libs -isystem /opt/local/include/vtk-8.1 -isystem /opt/local/include -isystem /opt/local/include/mpich-mp -isystem /opt/local/include/libxml2 -g -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=10.14 -fPIC -Wall -Wno-long-long -pedantic -fcolor-diagnostics -std=gnu++11 -MD -MT src/libs/CMakeFiles/Mercurve.dir/BlockMerger.cxx.o -MF src/libs/CMakeFiles/Mercurve.dir/BlockMerger.cxx.o.d -o src/libs/CMakeFiles/Mercurve.dir/BlockMerger.cxx.o -c ../src/libs/BlockMerger.cxx</div><div style="margin: 0px;">In file included from ../src/libs/BlockMerger.cxx:21:</div><div style="margin: 0px;">In file included from ../src/libs/BlockMerger.h:28:</div><div style="margin: 0px;">In file included from ../src/libs/types.h:25:</div><div style="margin: 0px;">In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:363:</div><div style="margin: 0px;">In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:19:</div><div style="margin: 0px;">/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:314:9: error: no member named 'signbit' in the global namespace</div><div style="margin: 0px;">[…]</div><div style="margin: 0px;"><br></div><div style="margin: 0px;">I read a bit the tickets of other ports, but they don’t fit exactly with what I have. Any fast hint? Do I need to downgrade Xcode?</div></div><br><div class="gmail_signature" ><pre><code> _
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