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Hi, after using make it seems that it's trying to link to gsl, but not gslcblas:

Linking C executable interp2dtest
//usr/local/lib/libgsl.so: undefined reference to cblas_dasum' //usr/local/lib/libgsl.so: undefined reference tocblas_sger'
//usr/local/lib/libgsl.so: undefined reference to cblas_cdotc_sub' //usr/local/lib/libgsl.so: undefined reference tocblas_icamax'

[...]

Adding gslcblas to target_link_libraries in CMakeLists.txt solved it for me.

Is there a specific reason why only a static library is built but not shared library?

Hello,

Run "interp2dtest" (compiled with with gcc 4.4.5) under valgrind and no issues found.

As an aside, as a complete newbie to Cmake I've found a little bit tricky to tell it where my gsl includes & libs are. A few words on this in the readme file would be helpful.

Regards.

hello,

i've just read through the GSL 2.1 manual: https://www.gnu.org/software/gsl/manual/html_node/2D-Introduction-to-Interpolation.html#g_t2D-Introduction-to-Interpolation

where it says that one needs two equally spaced grids x and y to use the functions for 2D interpolation. Is that true? thanks.

The cmake installation of interp2d on my Mac completed only partially. The static library was built successfully, but the linking of the interp2dtest failed:

[ 71%] Built target interp2d_static
[ 85%] Linking C executable interp2dtest
ld: library not found for -lgsl
collect2: error: ld returned 1 exit status
make[2]: *** [interp2dtest] Error 1
make[1]: *** [CMakeFiles/interp2dtest.dir/all] Error 2
make: *** [all] Error 2

The CMakeCache.txt contains all the necessary entries for gsl:

GSL_CFLAGS:INTERNAL=-I/opt/local/include
GSL_FOUND:INTERNAL=1
GSL_INCLUDEDIR:INTERNAL=/opt/local/include
GSL_INCLUDE_DIRS:INTERNAL=/opt/local/include
GSL_LDFLAGS:INTERNAL=-L/opt/local/lib;-lgsl;-lgslcblas;-lm
GSL_LIBDIR:INTERNAL=/opt/local/lib
GSL_LIBRARIES:INTERNAL=gsl;gslcblas;m
GSL_LIBRARY_DIRS:INTERNAL=/opt/local/lib

I wonder whether this info didn't trickle down into the link command for interp2dtest.