Hi,
I managed to build lib2geom on OS X. Since it was not an easy task I thought it might be useful to share the information with the community.
I planned to write a small tutorial and make it available soon. But first I'd like to request some advice regarding the following issues I faced during the build.
1. Avoid glib dependency I wanted to link lib2geom against my application without having to link against glib too so I replaced the following line in src/2geom/svg-path-parser.cpp: _push(g_ascii_strtod(buf.c_str(), NULL)); with _push(strtod(buf.c_str(), NULL));
and removed the glib.h include.
2. Removing librt Since librt does not exist in OS X (and is not required too) I removed the following line in src/2geom/toys/CMakeLists.txt TARGET_LINK_LIBRARIES(lpetoy "-lrt") TARGET_LINK_LIBRARIES(toy-2 "-lrt")
3. Call to pow is ambiguous Call to the pow function is ambiguous so I forced the call with casting by replacing pow( ..., ... ) with pow( (double) ..., (double) …)
in the following files: boolops-topo.cpp intersect-data.cpp levelsets-test.cpp pencil-2.cpp pencil.cpp sb-to-bez.cpp sketch-fitter.cpp sweeper-toy.cpp
4. clock_gettime does not exist on OS X In src/2geom/toys/toy-framework-2.h I replaced the following code snippet:
#ifdef WIN32 clock_gettime(clock, &ts); ns = ts.tv_sec * NS_PER_SECOND + ts.tv_nsec / NS_PER_NS; #else ns = 0; #endif
with
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time clock_serv_t cclock; mach_timespec_t mts; host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock); clock_get_time(cclock, &mts); mach_port_deallocate(mach_task_self(), cclock); ts.tv_sec = mts.tv_sec; ts.tv_nsec = mts.tv_nsec; ns = ts.tv_sec * NS_PER_SECOND + ts.tv_nsec / NS_PER_NS; #elif WIN32 clock_gettime(clock, &ts); ns = ts.tv_sec * NS_PER_SECOND + ts.tv_nsec / NS_PER_NS; #else ns = 0; #endif
and add the required includes at the beginning of the file. #ifdef __MACH__ # include <mach/clock.h> # include <mach/mach.h> #endif
See http://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-...
5. Cannot compile pw-toy.cpp I was not able to compile src/2geom/toys/pw-toy.cpp so I simply disable it in src/2geom/toys/CmakeLists.txt.
src/2geom/toys/pw-toy.cpp:48:30: error: variable length array of non-POD element type 'PiecewiseGeom::SBasis' Piecewise<SBasis> pws[curves];
6. Missing return value Added “return 0;” at the end of the function “cmpy” in uncross.cpp.
src/2geom/toys/uncross.cpp:175:5: error: control may reach end of non-void function [-Werror,-Wreturn-type]
That's all! :)
Thanks in advance Regards.