https://bugs.kde.org/show_bug.cgi?id=439611
Bug ID: 439611
Summary: libkdcraw should propagate the ${LIBS} from libraw.pc
Product: libkdcraw
Version: unspecified
Platform: Compiled Sources
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: General
Assignee: imaging-bugs-n...@kde.org
Reporter: rjvber...@gmail.com
Target Milestone: ---
SUMMARY
libraw can be built with OpenMP support, which, at least when building with
Clang, adds a dependency to a corresponding shared library. As a result, my
libraw.pc (for v0.20.2) has
```
Libs: -L${libdir} -lraw -fopenmp
```
STEPS TO REPRODUCE
1. build and install libraw with OpenMP support (`configure [...]
--enable-openmp [...]`)
2. build and install libkdcraw
3. try to build a dependent like gwenview
OBSERVED RESULT
The build will fail with the error message that libraw.so.20 has an undefined
reference to a range of __kmpc_XXX symbols.
EXPECTED RESULT
No build failure. Adding `-fopenmp` to the linker flags fixes the issue.
ADDITIONAL INFORMATION
I've observed this on Linux but I presume it will be the case on any Unix
version where private dependencies of shared libraries aren't pulled in
automatically and/or where libraw itself isn't linked to the openmp library (=
all Unices except Darwin?).
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