OK, I'm an idiot. It's *CMAKE_C_FLAGS* not *CMAKE_CPP_FLAGS*. It works now.
However, I am still surprised at the need to hack the *configure* script to make the test work. On Tue, Feb 14, 2023 at 4:33 PM Simon Eves <simon.e...@heavy.ai> wrote: > I recreated the compile/link test that *configure* is doing, and it also > fails outside. > > I then determined I could make it work by also adding *-lm* and > *-lpthread* to the link. > > I hacked GDAL *configure* script to also add those two to *$LIBS* when it > does the OpenJPEG link test, and now that passes, and then *configure* > reports OpenJPEG is enabled. > > However, when I then compile GDAL, it fails in the final huge link of > *libgdal.la > <http://libgdal.la>* with > > > */usr/bin/ld: /usr/local/mapd-deps/lib/libopenjp2.a(cio.c.o): relocation > R_X86_64_PC32 against symbol `opj_stream_write_skip' can not be used when > making a shared object; recompile with -fPIC/usr/bin/ld: final link failed: > bad value* > > I assume this is because it's trying to make a shared GDAL lib, but > including the static OpenJPEG lib. > > I tried adding * -DCMAKE_CPP_FLAGS="-fPIC" -DCMAKE_CXX_FLAGS="-fPIC"* to > the OpenJPEG build CMake invocation, but that made no difference. > > Any help with this would be greatly appreciated, as we're code-freezing > end of this week and I'd really like to get this in. > > > > On Sun, Feb 12, 2023 at 6:44 PM Simon Eves <simon.e...@heavy.ai> wrote: > >> Is there some trick to enabling this driver with the old non-CMake build >> env...? :) >> >> I am building OpenJPEG 2.5.0 (from source) and it's building and >> installing fine into the same include/lib tree as everything else, and then >> GDAL configure (just adding *--with-openjpeg*, no path, right?) sees it >> and tests it, but the compile test of *opj_setup_decoder()* apparently >> fails, so *HAVE_OPENJPEG* gets disabled again. >> >> I see that function in *openjpeg.h* and (with *nm*) in *libopenjp2.a*, >> so I'm not sure why it's failing. >> >> I tried some other CMake option variations for OpenJPEG but nothing fixed >> it. >> >> Ubuntu 20.04, GCC 9.4, GDAL 3.4.1, all-static build >> >> I have tried GDAL 3.6.2 (and PROJ 9.2.1) building them with CMake and I >> think the OpenJPEG part is working, then but our dependencies build falls >> over later with something else that doesn't like the newer PROJ, and I'd >> rather not bump the GDAL & PROJ and data files versions at this time >> anyway, as we're very close to a release. >> >> I just wanna minimally add JPEG2000 to what we have... >> >> TIA >> >> -- >> Simon Eves >> Senior Rendering Engineer >> +1 (415) 902-1996 >> simon.e...@heavy.ai >> >> <http://www.heavy.ai> >> >> (formerly OmniSci) >> >
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