libSystem not found using gfortran

Fri Oct 11 12:41:34 UTC 2019

Chris, thanks a lot for your very quick answer!

1. I followed the path for migration and reinstalled all packages. I 
will try to do it once more to be sure.
2. Xcode version: 11.0
3. My test program is minimum:

program test
   print*,'a'
end program test

4. The output with -v option is:

Driving: gfortran test.f90 -v -mmacosx-version-min=10.15.0 
-asm_macosx_version_min=10.15 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
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_0' 
--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_0)
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.15.0' 
'-asm_macosx_version_min=10.15' '-shared-libgcc' '-mtune=core2'
  /opt/local/libexec/gcc/x86_64-apple-darwin18/9.2.0/f951 test.f90 -fPIC 
-quiet -dumpbase test.f90 -mmacosx-version-min=10.15.0 -mtune=core2 
-auxbase test -version -fintrinsic-modules-path 
/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/finclude -o 
/var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//ccZubFPj.s
GNU Fortran (MacPorts gcc9 9.2.0_0) version 9.2.0 (x86_64-apple-darwin18)
     compiled by GNU C version 9.2.0, GMP version 6.1.2, MPFR version 
4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP

GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (MacPorts gcc9 9.2.0_0) version 9.2.0 
(x86_64-apple-darwin18)
     compiled by GNU C version 9.2.0, GMP version 6.1.2, MPFR version 
4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP

GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.15.0' '-shared-libgcc' 
'-mtune=core2'
  /opt/local/bin/as -arch x86_64 -v -force_cpusubtype_ALL 
-mmacosx-version-min=10.15 -o 
/var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//cce0rRJI.o 
/var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//ccZubFPj.s
Apple clang version 11.0.0 (clang-1100.0.33.8)
Target: x86_64-apple-darwin19.0.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
  "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1as -triple x86_64-apple-macosx10.15.0 -filetype obj -main-file-name ccZubFPj.s -target-cpu penryn -fdebug-compilation-dir /Users/houzeaux/Desktop -dwarf-debug-producer Apple clang version 11.0.0 (clang-1100.0.33.8) -dwarf-version=4 -mrelocation-model pic -o /var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//cce0rRJI.o /var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//ccZubFPj.s
Reading specs from 
/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/../../../libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.15.0' '-shared-libgcc' 
'-mtune=core2'
COMPILER_PATH=/opt/local/libexec/gcc/x86_64-apple-darwin18/9.2.0/:/opt/local/libexec/gcc/x86_64-apple-darwin18/9.2.0/:/opt/local/libexec/gcc/x86_64-apple-darwin18/:/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/:/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/
LIBRARY_PATH=/usr/lib/:/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/:/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/../../../
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.15.0' '-shared-libgcc' 
'-mtune=core2'
  /opt/local/libexec/gcc/x86_64-apple-darwin18/9.2.0/collect2 
-syslibroot 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/ 
-dynamic -arch x86_64 -macosx_version_min 10.15.0 
-weak_reference_mismatches non-weak -o a.out 
-L/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0 
-L/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/../../.. 
/var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//cce0rRJI.o -lgfortran 
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm 
-lgcc_ext.10.5 -lgcc -lSystem -v
collect2 version 9.2.0
/opt/local/bin/ld -syslibroot 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/ 
-dynamic -arch x86_64 -macosx_version_min 10.15.0 
-weak_reference_mismatches non-weak -o a.out 
-L/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0 
-L/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/../../.. 
/var/folders/1z/j0r1q88d2_95cj4fd50r39mr0000gr/T//cce0rRJI.o -lgfortran 
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm 
-lgcc_ext.10.5 -lgcc -lSystem -v
@(#)PROGRAM:ld  PROJECT:ld64-512.4
BUILD 05:06:53 Aug 16 2019
configured to support archs: armv6 armv7 armv7s arm64 arm64e arm64_32 
i386 x86_64 x86_64h armv6m armv7k armv7m armv7em
Library search paths:
     /opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0
     /opt/local/lib/gcc9
Framework search paths:
ld: library not found for -lSystem
collect2: error: ld returned 1 exit status

>
> one more request.
>
> please post the full output from compiling your test code with the -v 
> option.
>
> cheers Chris
>
> On 11/10/2019 12:59 pm, Chris Jones wrote:
>>
>> can you please direct us to the exact test application code you are 
>> using ?
>>
>> Also, can you confirm the exact Xcode version you are using ?
>>
>> Have you correctly followed the macports migration guide after 
>> updating your OS ?
>>
>> https://trac.macports.org/wiki/Migration
>>
>> cheers Chris
>>
>> On 11/10/2019 12:55 pm, Guillaume Houzeaux @ BSC wrote:
>>> Hello,
>>>
>>> I'm compiling with gfortran9 on catalina and get this error:
>>>
>>> gfortran test.f90
>>> ld: library not found for -lSystem
>>> collect2: error: ld returned 1 exit status
>>>
>>> Seems that it does not find the library libSystem. I changed all the 
>>> library paths in my bash_profile
>>>
>>> to include /usr/lib but does not work. The only solution for the 
>>> moment is to compile with
>>>
>>> gfortran test.f90-L/usr/lib
>>>
>>> but this is not a practical option... Any idea on how to fix this?
>>>
>>> Thanks in advance
>>>
>>> -- 
>>> Guillaume Houzeaux
>>> Team Leader
>>> Dpt. Computer Applications in Science and Engineering
>>> Barcelona Supercomputing Center (BSC-CNS)
>>> Edificio NEXUS II - Office 3A, c) Jordi Girona 29
>>> 08034 Barcelona, Spain
>>>
>>> Location: 
>>> <https://www.google.es/maps/place/Carrer+de+Jordi+Girona,+08034+Barcelona/@41.3881175,2.1132195,17z/data=!3m1!4b1!4m8!1m2!10m1!1e2!3m4!1s0x12a4985099390467:0xd9abcf1987739b3e!8m2!3d41.3881175!4d2.1154135?hl=en> 
>>>
>>> Tel: +34 93 413 7781
>>> Skype user: guillaume_houzeaux_bsc
>>> WWW: BSC profile <https://www.bsc.es/houzeaux-guillaume>
>>> ResearcherID: D-4950-2012
>>> Scientific Profile: 
>>> <https://www.researchgate.net/profile/Guillaume_Houzeaux> 
>>> <http://scholar.google.es/citations?user=cL9khdYAAAAJ&hl=en> 
>>> <http://orcid.org/0000-0002-2592-1426> 
>>> <http://www.researcherid.com/rid/D-4950-2012>
>>>

-- 
Guillaume Houzeaux
Team Leader
Dpt. Computer Applications in Science and Engineering
Barcelona Supercomputing Center (BSC-CNS)
Edificio NEXUS II - Office 3A, c) Jordi Girona 29
08034 Barcelona, Spain

Location: 
<https://www.google.es/maps/place/Carrer+de+Jordi+Girona,+08034+Barcelona/@41.3881175,2.1132195,17z/data=!3m1!4b1!4m8!1m2!10m1!1e2!3m4!1s0x12a4985099390467:0xd9abcf1987739b3e!8m2!3d41.3881175!4d2.1154135?hl=en> 

Tel: +34 93 413 7781
Skype user: guillaume_houzeaux_bsc
WWW: BSC profile <https://www.bsc.es/houzeaux-guillaume>
ResearcherID: D-4950-2012
Scientific Profile: 
<https://www.researchgate.net/profile/Guillaume_Houzeaux> 
<http://scholar.google.es/citations?user=cL9khdYAAAAJ&hl=en> 
<http://orcid.org/0000-0002-2592-1426> 
<http://www.researcherid.com/rid/D-4950-2012>

http://bsc.es/disclaimer
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