> On 10 Nov 2019, at 6:33 pm, Fielding, Eric J (US 329A) via macports-users 
> <macports-users@lists.macports.org> wrote:
> My employer automatically installs the latest versions of MacOS software, 
> including now Xcode 11.2. I have been seeing several suggestions that we 
> should go back to Xcode 10.3, which I tried a few weeks ago when I was on 
> Xcode 11.1. That was OK and all my ports were working until they upgraded my 
> machine to Xcode 11.2. At first, there was an incompatibility between the 
> version of the Swift library from my 10.3 installation that was still in the 
> Xcode directories and the system Swift library so nothing in the compiler 
> would work. I deleted my whole Xcode.app directory and reinstalled Xcode 
> 11.2. Now that I have a clean Xcode 11.2, it does not have the 
> MacOSX10.14.sdk installed and the gcc7 and gcc9 installations from MacPorts 
> are still depending on that. I tried reinstalling the command-line tools, as 
> someone suggested yesterday, but it tells me that they are already installed.

You might need to manually force a CLT update, as its possible it is not being 
correctly updated. See


> I uninstalled my gcc7 port and reinstalled it to see if it would update the 
> libraries. The port install command installed the precompiled binaries that 
> are linked to the MacOSX10.14.sdk, so it won’t run correctly. Can I force 
> MacPorts to recompile gcc7 instead of using the precompiled binaries?

Yes. Use the ‘-s’ option with port.


> This is the output of ‘cpp -v’ from gcc7 (it is similar if I select gcc9):
> Using built-in specs.
> Target: x86_64-apple-darwin18
> Configured with: 
> /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc7/gcc7/work/gcc-7.4.0/configure
>  --prefix=/opt/local --build=x86_64-apple-darwin18 
> --enable-languages=c,c++,objc,obj-c++,lto,fortran 
> --libdir=/opt/local/lib/gcc7 --includedir=/opt/local/include/gcc7 
> --infodir=/opt/local/share/info --mandir=/opt/local/share/man 
> --datarootdir=/opt/local/share/gcc-7 --with-local-prefix=/opt/local 
> --with-system-zlib --disable-nls --program-suffix=-mp-7 
> --with-gxx-include-dir=/opt/local/include/gcc7/c++/ --with-gmp=/opt/local 
> --with-mpfr=/opt/local --with-mpc=/opt/local --with-isl=/opt/local 
> --enable-stage1-checking --disable-multilib --enable-lto 
> --enable-libstdcxx-time --with-build-config=bootstrap-debug 
> --with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld 
> --with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket 
> <https://trac.macports.org/newticket> --disable-tls 
> --with-pkgversion='MacPorts gcc7 7.4.0_3' 
> --with-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
> Thread model: posix
> gcc version 7.4.0 (MacPorts gcc7 7.4.0_3)
> COLLECT_GCC_OPTIONS='-E' '-v' '-mmacosx-version-min=10.14.7' 
> '-asm_macosx_version_min=10.14' '-mtune=core2'
> /opt/local/libexec/gcc/x86_64-apple-darwin18/7.4.0/cc1 -E -quiet -v 
> -D__DYNAMIC__ - -fPIC -mmacosx-version-min=10.14.7 -mtune=core2
> ignoring nonexistent directory 
> "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/opt/local/include"
> ignoring nonexistent directory 
> "/opt/local/lib/gcc7/gcc/x86_64-apple-darwin18/7.4.0/../../../../../x86_64-apple-darwin18/include"
> ignoring nonexistent directory 
> "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include"
> ignoring nonexistent directory 
> "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks"
> ignoring nonexistent directory 
> "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/Library/Frameworks"
> #include "..." search starts here:
> #include <...> search starts here:
> /opt/local/lib/gcc7/gcc/x86_64-apple-darwin18/7.4.0/include
> /opt/local/lib/gcc7/gcc/x86_64-apple-darwin18/7.4.0/include-fixed
> End of search list.

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