[MacPorts] #59727: gcc9: fails to link properly (-lSystem no found)

[MacPorts]

#59727: gcc9: fails to link properly (-lSystem no found)
--------------------+-----------------------
 Reporter:  akimd   |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.6.2
 Keywords:          |       Port:  gcc8 gcc9
--------------------+-----------------------
 Hi,

 It feels wrong to report this: I saw no-one reporting it, yet I have had
 the problem for about one week, starting when I upgraded to Xcode 11.2.1
 on my macOS 10.14.6, and found no ticket about it...  I guess I did not
 look at the right place.

 {{{
 $ cat foo.c
 int main () {
   return 42;
 }
 $ gcc-mp-7 foo.c
 $ ./a.out ; echo $?
 42
 $ gcc-mp-8 foo.c
 ld: library not found for -lSystem
 collect2: error: ld returned 1 exit status
 $ gcc-mp-9 foo.c
 ld: library not found for -lSystem
 collect2: error: ld returned 1 exit status
 }}}

 FWIW, gcc7 used to fail too, but since I rerun {xcode-select --install} it
 works.  I uninstalled gcc9 and reinstall it, to no avail.

 I don't know what information might help you.

 {{{
 $ gcc-mp-7 -v
 Using built-in specs.
 COLLECT_GCC=gcc-mp-7
 COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin18/7.5.0
 /lto-wrapper
 Target: x86_64-apple-darwin18
 Configured with:
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc7/gcc7/work/gcc-7.5.0/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
 --disable-tls --with-pkgversion='MacPorts gcc7 7.5.0_0' --with-
 sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk
 Thread model: posix
 gcc version 7.5.0 (MacPorts gcc7 7.5.0_0)
 $ gcc-mp-8 -v
 Using built-in specs.
 COLLECT_GCC=gcc-mp-8
 COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin18/8.3.0
 /lto-wrapper
 Target: x86_64-apple-darwin18
 Configured with:
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc8/gcc8/work/gcc-8.3.0/configure
 --prefix=/opt/local --build=x86_64-apple-darwin18 --enable-
 languages=c,c++,objc,obj-c++,lto,fortran --libdir=/opt/local/lib/gcc8
 --includedir=/opt/local/include/gcc8 --infodir=/opt/local/share/info
 --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-8 --with-
 local-prefix=/opt/local --with-system-zlib --disable-nls --program-
 suffix=-mp-8 --with-gxx-include-dir=/opt/local/include/gcc8/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
 --disable-tls --with-pkgversion='MacPorts gcc8 8.3.0_4' --with-
 sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
 Thread model: posix
 gcc version 8.3.0 (MacPorts gcc8 8.3.0_4)
 $ gcc-mp-9 -v
 Using built-in specs.
 COLLECT_GCC=gcc-mp-9
 COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin18/9.2.0
 /lto-wrapper
 Target: x86_64-apple-darwin18
 Configured with:
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc9/gcc9/work/gcc-9.2.0/configure
 --prefix=/opt/local --build=x86_64-apple-darwin18 --enable-
 languages=c,c++,objc,obj-c++,lto,fortran --libdir=/opt/local/lib/gcc9
 --includedir=/opt/local/include/gcc9 --infodir=/opt/local/share/info
 --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-9 --with-
 local-prefix=/opt/local --with-system-zlib --disable-nls --program-
 suffix=-mp-9 --with-gxx-include-dir=/opt/local/include/gcc9/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
 --disable-tls --with-pkgversion='MacPorts gcc9 9.2.0_1' --with-
 sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
 Thread model: posix
 gcc version 9.2.0 (MacPorts gcc9 9.2.0_1)
 }}}


 Also, port 2.6.2's diagnose reports that Xcode 11.2 is supported, but not
 Xcode 11.2.1. But...

 Finally, there's no "maintainer" registered in the port.  Cheers!

-- 
Ticket URL: <https://trac.macports.org/ticket/59727>
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