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gsl: fix build on !i386 uClibc

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uClibc pretends to implement <fenv.h> as it installs the header, but
in practice, it only implements the functions for i386. This makes gsl
unhappy as it detects fenv.h, but then cannot use the fenv functions.

Fixes:

  http://autobuild.buildroot.org/results/732cc07faeca2a9098dc5106e8f654eb1323451a/build-end.log

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni 2012-11-17 12:24:04 +00:00 committed by Peter Korsgaard
parent 29b792690b
commit 7603f9d38a
1 changed files with 13 additions and 0 deletions
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13
package/gsl/gsl.mk
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@ -10,4 +10,17 @@ GSL_INSTALL_STAGING = YES
GSL_LICENSE = GPLv3
GSL_LICENSE_FILES = COPYING
# uClibc pretends to have fenv support as it installs <fenv.h>, but in
# practice, it only implements it for i386. Problem reported upstream
# at: http://lists.busybox.net/pipermail/uclibc/2012-October/047067.html.
# So we tell gsl that fenv related functions are not available in this
# case.
ifeq ($(BR2_TOOLCHAIN_BUILDROOT)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC)$(BR2_TOOLCHAIN_CTNG_uClibc),y)
ifneq ($(BR2_i386),y)
GSL_CONF_ENV = \
ac_cv_have_decl_feenableexcept=no \
ac_cv_have_decl_fesettrapenable=no
endif
endif
$(eval $(autotools-package))