package/gnuplot: fix build failures on undefined FE_UNDERFLOW
Gnuplot carries the implicit assumption that, if the header fenv.h is
available, then it must define FE_UNDERFLOW. This assumption fails on
microblaze{,el}, mips{,64}{,el}, nios2 and or1k.
Fixes:
- https://autobuild.buildroot.org/results/aa177c4f4f7c7429f052cebbf54f7027e4b2cabd/
- https://autobuild.buildroot.org/results/868ca441daa2485b997f307edeede31dd229bfc2/
- https://autobuild.buildroot.org/results/0a152cbfe23703bc5012098864d7fd5608775882/
- https://autobuild.buildroot.org/results/d43be86091c9bd9163c145264151532f0f485528/
Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Edgar Bonet
5ab8eb3cac