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Subject: [Bug 222858] Clang doesn't find <omp.h> and libomp.so when compiling
 with -fopenmp
Date: Sun, 08 Oct 2017 11:25:39 +0000
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: misc
X-Bugzilla-Version: 11.1-STABLE
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X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: equilibrium556@gmx.de
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222858

            Bug ID: 222858
           Summary: Clang doesn't find <omp.h> and libomp.so when
                    compiling with -fopenmp
           Product: Base System
           Version: 11.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: equilibrium556@gmx.de

Created attachment 186994
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D186994&action=
=3Dedit
OpenMP C test file

Trying to compile C code that utilizes OpenMP with Clang on FreeBSD 11.1
results in some compiler/linker errors:

Trying to compile with:
clang -o openmp_test openmp_test.c -fopenmp

openmp_test.c:1:10: fatal error: 'omp.h' file not found

It is located in /usr/local/include (openmp package) though

Trying again to compile with:
clang -o openmp_test openmp_test.c -fopenmp -I/usr/local/include

/usr/bin/ld: cannot find -lomp

It is located in /usr/local/lib (openmp package)

Finally, it compiles with:
clang -o openmp_test openmp_test.c -fopenmp -I/usr/local/include
-L/usr/local/lib

Shouldn't it add the right search paths for OpenMP from the get-go when iss=
uing
-fopenmp?

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