tree c275fa03f772e5d25d26efcbc0ccd2754fa813ff
parent 7b5fe9b0762a64136a540d8c342c1b99f23508f2
author Arnaud Vrac <rawoul@gmail.com> 1501934339 +0200
committer Quentin Glidic <sardemff7+git@sardemff7.net> 1502438294 +0200
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configure.ac: fix linking when using compiler sanitizers

The GCC address sanitizer overrides dlopen and dlclose, so the configure
test does not detect libdl as a needed dependency for linking. It is
still needed though, as dlsym is not exported by the sanitizer. The
result is that linking fails in the end.

Fix this by checking for dlsym instead of dlopen.

This can be reproduced by configuring the build with:
CFLAGS="-fsanitize=address -fsanitize=undefined"
LDFLAGS="-fsanitize=address -fsanitize=undefined"

Signed-off-by: Arnaud Vrac <rawoul@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>