Policy CMP0072 is not set

[thx1111]

CMake Warning (dev) at /usr/share/cmake/Modules/FindOpenGL.cmake:315 (message):
  Policy CMP0072 is not set: FindOpenGL prefers GLVND by default when
  available.  Run "cmake --help-policy CMP0072" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  FindOpenGL found both a legacy GL library:

    OPENGL_gl_LIBRARY: /usr/lib/libGL.so

  and GLVND libraries for OpenGL and GLX:

    OPENGL_opengl_LIBRARY: /usr/lib/libOpenGL.so
    OPENGL_glx_LIBRARY: /usr/lib/libGLX.so

  OpenGL_GL_PREFERENCE has not been set to "GLVND" or "LEGACY", so for
  compatibility with CMake 3.10 and below the legacy GL library will be used.

CMakeLists.txt
---------------------
...
SET(CMAKE_POLICY_DEFAULT_CMP0072 NEW)
...

[Abdull]

Documentation:

• https://cmake.org/cmake/help/latest/module/FindOpenGL.html
• https://cmake.org/cmake/help/latest/policy/CMP0072.html
• cmake --help-policy CMP0072

• I got the reported warning as well when building Cubic SDR on version https://github.com/cjcliffe/CubicSDR/tree/033330367cd179d7b04503027d41afa7514036f4 on my system, which has the following setup:

• Framework 13 AMD laptop
• Debian 12 bookworm, amd64
• maybe relevant: my system has a couple of self-built mesa3d, drm, amdgpu stuff
• cmake --version: 3.25.1

Default (legacy, OLD) build - CubicSDR works

mkdir build
cd build/
cmake ..

# reported warning message appears, hence the OpenGL_GL_PREFERENCE "LEGACY" is used 
make

x64/CubicSDR

# executing "../build/x64/CubicSDR" starts up CubicSDR correctly

ldd ../build/x64/CubicSDR | grep -i gl
#         libwx_gtk3u_gl-3.2.so.0 => /lib/x86_64-linux-gnu/libwx_gtk3u_gl-3.2.so.0 (0x00007fd2b47e2000)
#         libGL.so.1 => /usr/local/lib/x86_64-linux-gnu/libGL.so.1 (0x00007fd2b3b0f000)
#         libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fd2b2492000)
#         libglapi.so.0 => /usr/local/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007fd2b21db000)
#         libxcb-glx.so.0 => /lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007fd2b21a8000)
#         libwayland-egl.so.1 => /lib/x86_64-linux-gnu/libwayland-egl.so.1 (0x00007fd2b2006000)

"Modern" (GLVND, NEW) build - CubicSDR crashes

I was curious if using OpenGL_GL_PREFERENCE "GLVND" has any benefit. To do so,

• either add the following to CMakeLists.txt ("method 1"):

  if(POLICY CMP0072)
  cmake_policy(SET CMP0072 NEW)
  endif()

• or generate with the following settings ("method 2"):

  mkdir build-glvnd
  cd build-glvnd/
  cmake -DCMAKE_POLICY_DEFAULT_CMP0072=NEW ..

Example run using method 2:

  mkdir build-glvnd
  cd build-glvnd/
  cmake -DCMAKE_POLICY_DEFAULT_CMP0072=NEW ..

# reported warning no longer appears, because a OpenGL_GL_PREFERENCE, "GLVND", is explicitly set
make

x64/CubicSDR

# executing "../build-glvnd/x64/CubicSDR" CRASHES, see below core dump

ldd ../build-glvnd/x64/CubicSDR | grep -i gl
        libwx_gtk3u_gl-3.2.so.0 => /lib/x86_64-linux-gnu/libwx_gtk3u_gl-3.2.so.0 (0x00007f2a826d1000)
        libOpenGL.so.0 => /lib/x86_64-linux-gnu/libOpenGL.so.0 (0x00007f2a81a43000)
        libGLX.so.0 => /lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f2a81a0d000)
        libGL.so.1 => /usr/local/lib/x86_64-linux-gnu/libGL.so.1 (0x00007f2a80806000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f2a80320000)
        libGLdispatch.so.0 => /lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f2a7ffe3000)
        libwayland-egl.so.1 => /lib/x86_64-linux-gnu/libwayland-egl.so.1 (0x00007f2a7f984000)
        libglapi.so.0 => /usr/local/lib/x86_64-linux-gnu/libglapi.so.0 (0x00007f2a7f8db000)
        libxcb-glx.so.0 => /lib/x86_64-linux-gnu/libxcb-glx.so.0 (0x00007f2a7f8a8000)

GLVND build core dump (click to expand/toggle)

``` Jun 21 19:05:10 abdull systemd-coredump[779934]: [🡕] Process 779922 (CubicSDR) of user 1000 dumped core. Module libsystemd.so.0 from deb systemd-252.22-1~deb12u1.amd64 Stack trace of thread 779922: #0 0x00007f2c3a0dde2c __pthread_kill_implementation (libc.so.6 + 0x8ae2c) #1 0x00007f2c3a08efb2 __GI_raise (libc.so.6 + 0x3bfb2) #2 0x00007f2c3a079472 __GI_abort (libc.so.6 + 0x26472) #3 0x00007f2c3a079395 __assert_fail_base (libc.so.6 + 0x26395) #4 0x00007f2c3a087eb2 __GI___assert_fail (libc.so.6 + 0x34eb2) #5 0x00007f2c38603382 _glapi_add_dispatch (libglapi.so.0 + 0x19382) #6 0x00007f2c260a4d51 n/a (radeonsi_dri.so + 0x2f5d51) #7 0x00007f2c3a0e0f97 __pthread_once_slow (libc.so.6 + 0x8df97) #8 0x00007f2c25fbd3aa n/a (radeonsi_dri.so + 0x20e3aa) #9 0x00007f2c25f2527d n/a (radeonsi_dri.so + 0x17627d) #10 0x00007f2c25e60c53 n/a (radeonsi_dri.so + 0xb1c53) #11 0x00007f2c25e642fc n/a (radeonsi_dri.so + 0xb52fc) #12 0x00007f2c34157114 n/a (libGLX_mesa.so.0 + 0x43114) #13 0x00007f2c341418d5 n/a (libGLX_mesa.so.0 + 0x2d8d5) #14 0x00007f2c341450e2 n/a (libGLX_mesa.so.0 + 0x310e2) #15 0x00007f2c341454dd n/a (libGLX_mesa.so.0 + 0x314dd) #16 0x00007f2c3a7208f3 glXCreateContext (libGLX.so.0 + 0x48f3) #17 0x00007f2c3b3f214a _ZN11wxGLContextC1EP10wxGLCanvasPKS_PK16wxGLContextAttrs (libwx_gtk3u_gl-3.2.so.0 + 0x1214a) #18 0x000055dbf8178939 _ZN16PrimaryGLContextC1EP10wxGLCanvasP11wxGLContextP16wxGLContextAttrs (CubicSDR + 0x192939) #19 0x000055dbf80af00b _ZN8CubicSDR10GetContextEP10wxGLCanvas (CubicSDR + 0xc900b) #20 0x000055dbf818de18 _ZN10GainCanvasC1EP8wxWindowRK14wxGLAttributes (CubicSDR + 0x1a7e18) #21 0x000055dbf80cecd4 _ZN8AppFrameC2Ev (CubicSDR + 0xe8cd4) #22 0x000055dbf80b44da _ZN8CubicSDR6OnInitEv (CubicSDR + 0xce4da) #23 0x00007f2c3a89ceea _Z7wxEntryRiPPw (libwx_baseu-3.2.so.0 + 0x11feea) #24 0x000055dbf809fc18 main (CubicSDR + 0xb9c18) #25 0x00007f2c3a07a24a __libc_start_call_main (libc.so.6 + 0x2724a) #26 0x00007f2c3a07a305 __libc_start_main_impl (libc.so.6 + 0x27305) #27 0x000055dbf80a35a1 _start (CubicSDR + 0xbd5a1) Stack trace of thread 779925: #0 0x00007f2c3a0d8e96 __futex_abstimed_wait_common64 (libc.so.6 + 0x85e96) #1 0x00007f2c3a0dbb2f __pthread_cond_wait_common (libc.so.6 + 0x88b2f) #2 0x000055dbf810d18b _ZN13SDRPostThread3runEv (CubicSDR + 0x12718b) #3 0x000055dbf80eb63a _ZN8IOThread10threadMainEv (CubicSDR + 0x10563a) #4 0x00007f2c3a4094a3 execute_native_thread_routine (libstdc++.so.6 + 0xd44a3) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779924: #0 0x00007f2c3a122485 __GI___clock_nanosleep (libc.so.6 + 0xcf485) #1 0x00007f2c3a126d93 __GI___nanosleep (libc.so.6 + 0xd3d93) #2 0x000055dbf81a2244 _ZN24SpectrumVisualDataThread3runEv (CubicSDR + 0x1bc244) #3 0x000055dbf80eb63a _ZN8IOThread10threadMainEv (CubicSDR + 0x10563a) #4 0x00007f2c3a4094a3 execute_native_thread_routine (libstdc++.so.6 + 0xd44a3) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779926: #0 0x00007f2c3a14f15f __GI___poll (libc.so.6 + 0xfc15f) #1 0x00007f2c390839ae g_main_context_poll (libglib-2.0.so.0 + 0x549ae) #2 0x00007f2c39083acc g_main_context_iteration (libglib-2.0.so.0 + 0x54acc) #3 0x00007f2c39083b11 glib_worker_main (libglib-2.0.so.0 + 0x54b11) #4 0x00007f2c390adcfd g_thread_proxy (libglib-2.0.so.0 + 0x7ecfd) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779929: #0 0x00007f2c3a0d8e96 __futex_abstimed_wait_common64 (libc.so.6 + 0x85e96) #1 0x00007f2c3a0db558 __pthread_cond_wait_common (libc.so.6 + 0x88558) #2 0x00007f2c25ebb059 n/a (radeonsi_dri.so + 0x10c059) #3 0x00007f2c25e6d17b n/a (radeonsi_dri.so + 0xbe17b) #4 0x00007f2c25ebaf97 n/a (radeonsi_dri.so + 0x10bf97) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779927: #0 0x00007f2c3a14f15f __GI___poll (libc.so.6 + 0xfc15f) #1 0x00007f2c390839ae g_main_context_poll (libglib-2.0.so.0 + 0x549ae) #2 0x00007f2c39083cef g_main_loop_run (libglib-2.0.so.0 + 0x54cef) #3 0x00007f2c392807b6 gdbus_shared_thread_func (libgio-2.0.so.0 + 0x1197b6) #4 0x00007f2c390adcfd g_thread_proxy (libglib-2.0.so.0 + 0x7ecfd) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779930: #0 0x00007f2c3a0d8e96 __futex_abstimed_wait_common64 (libc.so.6 + 0x85e96) #1 0x00007f2c3a0db558 __pthread_cond_wait_common (libc.so.6 + 0x88558) #2 0x00007f2c25ebb059 n/a (radeonsi_dri.so + 0x10c059) #3 0x00007f2c25e6d17b n/a (radeonsi_dri.so + 0xbe17b) #4 0x00007f2c25ebaf97 n/a (radeonsi_dri.so + 0x10bf97) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779931: #0 0x00007f2c3a0d8e96 __futex_abstimed_wait_common64 (libc.so.6 + 0x85e96) #1 0x00007f2c3a0db558 __pthread_cond_wait_common (libc.so.6 + 0x88558) #2 0x00007f2c25ebb059 n/a (radeonsi_dri.so + 0x10c059) #3 0x00007f2c25e6d17b n/a (radeonsi_dri.so + 0xbe17b) #4 0x00007f2c25ebaf97 n/a (radeonsi_dri.so + 0x10bf97) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779932: #0 0x00007f2c3a0d8e96 __futex_abstimed_wait_common64 (libc.so.6 + 0x85e96) #1 0x00007f2c3a0db558 __pthread_cond_wait_common (libc.so.6 + 0x88558) #2 0x00007f2c25ebb059 n/a (radeonsi_dri.so + 0x10c059) #3 0x00007f2c25e6d17b n/a (radeonsi_dri.so + 0xbe17b) #4 0x00007f2c25ebaf97 n/a (radeonsi_dri.so + 0x10bf97) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) Stack trace of thread 779923: #0 0x00007f2c3a122485 __GI___clock_nanosleep (libc.so.6 + 0xcf485) #1 0x00007f2c3a126d93 __GI___nanosleep (libc.so.6 + 0xd3d93) #2 0x000055dbf81a2244 _ZN24SpectrumVisualDataThread3runEv (CubicSDR + 0x1bc244) #3 0x000055dbf80eb63a _ZN8IOThread10threadMainEv (CubicSDR + 0x10563a) #4 0x00007f2c3a4094a3 execute_native_thread_routine (libstdc++.so.6 + 0xd44a3) #5 0x00007f2c3a0dc134 start_thread (libc.so.6 + 0x89134) #6 0x00007f2c3a15c7dc __clone3 (libc.so.6 + 0x1097dc) ELF object binary architecture: AMD x86-64 ░░ Subject: Process 779922 (CubicSDR) dumped core ░░ Defined-By: systemd ░░ Support: https://www.debian.org/support ░░ Documentation: man:core(5) ░░ ░░ Process 779922 (CubicSDR) crashed and dumped core. ░░ ░░ This usually indicates a programming error in the crashing program and ░░ should be reported to its vendor as a bug. ```