[package] imagemagick/7.0.11-14 : Linker error against openjpeg in Ubuntu 20.04

[wbehrens-on-gh]

Package and Environment Details (include every applicable attribute)

• Package Name/Version: imagemagick/7.0.11-14
• Operating System+version: Linux Ubuntu 20.04
• Compiler+version: GCC 9.3.0
• Docker image: N/A
• Conan version: conan 1.43.0
• Python version: Python 3.8.10

Conan profile (output of conan profile show default or conan profile show <profile> if custom profile is in use)

[settings]
os=Linux
os_build=Linux
arch=x86_64
arch_build=x86_64
compiler=gcc
compiler.version=9
compiler.libcxx=libstdc++11
build_type=Release
[options]
[conf]
[build_requires]
[env]

Steps to reproduce (Include if Applicable)

conan create . -pr:b=default --build
I also should mention that in the only hits on google I got for this error it said something about different libc ABI issues but I currently am building all these packages locally so they should be built all against the same libc?

Logs (Include/Attach if Applicable)

Click to expand log

  CXXLD    Magick++/lib/libMagick++-7.Q16HDRI.la
  CCLD     utilities/magick
/usr/bin/ld: /home/william/.conan/data/openjpeg/2.4.0/_/_/package/6af9cc7cb931c5ad942174fd7838eb655717c709/lib/libopenjp2.a(tcd.c.o): in function `opj_tcd_rateallocate':
tcd.c:(.text+0x3ab8): undefined reference to `__exp_finite'
/usr/bin/ld: /home/william/.conan/data/openjpeg/2.4.0/_/_/package/6af9cc7cb931c5ad942174fd7838eb655717c709/lib/libopenjp2.a(tcd.c.o): in function `opj_tcd_init_tile':
tcd.c:(.text+0x4b10): undefined reference to `__exp2_finite'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:8045: utilities/magick] Error 1
make[1]: Leaving directory '/home/william/.conan/data/imagemagick/7.0.11-14/_/_/build/495d4b92c4faa6a17bffb74bd0c85094a64623ed/ImageMagick'
make: *** [Makefile:6121: all] Error 2
imagemagick/7.0.11-14: 
imagemagick/7.0.11-14: ERROR: Package '495d4b92c4faa6a17bffb74bd0c85094a64623ed' build failed
imagemagick/7.0.11-14: WARN: Build folder /home/william/.conan/data/imagemagick/7.0.11-14/_/_/build/495d4b92c4faa6a17bffb74bd0c85094a64623ed
ERROR: imagemagick/7.0.11-14: Error in build() method, line 156
	env_build.make()
	ConanException: Error 2 while executing make -j8

[ericLemanissier]

it looks like a glibc incompatibility issue. can you try to rebuild openjpeg with command line argument -b openjpeg ?

[wbehrens-on-gh]

hm strange, openjpeg was built on that same system already, re running the build fixed it

[mmomtchev]

@ericLemanissier If I delete my ~/.conan and start anew with an openjpeg/2.5.0 in my requirements, I get a libjp2 with the dreaded -ffast-math. If I reinstall it with conan install . -b openjpeg, it goes away. I am using conan 1.61.0 and I have an empty default profile.

The current generally prevailing opinion is that -ffast-math should be burninated. glibc has dropped support for it.

[ericLemanissier]

see #18951 (comment) and conan-io/hooks#508 for related dicussion

A simple solution is to use -fno-finite-math-only compilation flag during build of the offending package (openjpeg). Don't hesitate to make a PR, something like:

if not is_msvc(self):
    tc.variables["CMAKE_C_FLAGS"] = "-fno-finite-math-only"
    tc.variables["CMAKE_CXX_FLAGS"] = "-fno-finite-math-only"