[MacPorts] #67164: gcc12 @12.2.0_2: gfortran does not find libSystem

[MacPorts]

#67164: gcc12 @12.2.0_2: gfortran does not find libSystem
----------------------+--------------------
  Reporter:  jsalort  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  gcc12    |
----------------------+--------------------

Comment (by kencu):

 so my buildbot-installed version is working fine, but it is not configured
 right.

 {{{
 % gcc-mp-12 -v
 Using built-in specs.
 COLLECT_GCC=gcc-mp-12
 COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/arm64-apple-darwin22/12.2.0
 /lto-wrapper
 Target: arm64-apple-darwin22
 Configured with:
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc12/gcc12/work/gcc-12.2.0/configure
 --prefix=/opt/local --build=arm64-apple-darwin22 --enable-
 languages=c,c++,objc,obj-c++,lto,fortran,jit --libdir=/opt/local/lib/gcc12
 --includedir=/opt/local/include/gcc12 --infodir=/opt/local/share/info
 --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-12
 --with-local-prefix=/opt/local --with-system-zlib --disable-nls --program-
 suffix=-mp-12 --with-gxx-include-dir=/opt/local/include/gcc12/c++/ --with-
 gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --with-
 isl=/opt/local --with-zstd=/opt/local --enable-checking=release --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 --enable-host-shared --with-
 darwin-extra-rpath=/opt/local/lib/libgcc --with-libiconv-prefix=/opt/local
 --disable-tls --with-gxx-libcxx-include-
 dir=/opt/local/libexec/gcc12/libc++/include/c++/v1 --with-
 pkgversion='MacPorts gcc12 12.2.0_2+stdlib_flag' --with-
 sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk
 Thread model: posix
 Supported LTO compression algorithms: zlib zstd
 gcc version 12.2.0 (MacPorts gcc12 12.2.0_2+stdlib_flag)
 }}}

 as you can see, it's configured to look here for the SDK:

 {{{
 --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk
 }}}
 but it is supposed to be configured to look here:
 {{{
 --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
 }}}

 anyway, mine works because I happen to have something at {{{--with-
 sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk}}} that
 looks like an SDK:

 {{{
 % ls -la /Library/Developer/CommandLineTools/SDKs
 total 0
 drwxr-xr-x  8 root  wheel  256  9 Jan 22:50 .
 drwxr-xr-x  5 root  wheel  160  9 Jan 22:50 ..
 lrwxr-xr-x  1 root  wheel   14  9 Jan 22:50 MacOSX.sdk -> MacOSX13.1.sdk
 drwxr-xr-x  7 root  wheel  224 19 Nov  2021 MacOSX12.1.sdk
 drwxr-xr-x  7 root  wheel  224  9 Jan 22:50 MacOSX12.3.sdk
 lrwxr-xr-x  1 root  wheel   14  9 Jan 22:49 MacOSX12.sdk -> MacOSX12.3.sdk
 drwxr-xr-x  7 root  wheel  224 12 Nov 13:18 MacOSX13.1.sdk
 lrwxr-xr-x  1 root  wheel   14  9 Jan 22:49 MacOSX13.sdk -> MacOSX13.1.sdk
 }}}

 but that is probably just luck.

-- 
Ticket URL: <https://trac.macports.org/ticket/67164#comment:5>
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