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Configure: Added explicit check for math library header

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Compilation will not work if the header is missing, so make sure
it is present and compilable first. This can highligh sooner if
a user forgot to install the corresponding dev package.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
This commit is contained in:
Christophe CURIS
2013-06-16 21:50:57 +02:00
committed by Carlos R. Mafra
parent f68ec6c913
commit 95ee539d6d
1 changed files with 3 additions and 1 deletions
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4
m4/wm_libmath.m4
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@@ -22,7 +22,9 @@
# Checks the needed library link flags needed to have math lib # Checks the needed library link flags needed to have math lib
# Sets variable LIBM with the appropriates flags # Sets variable LIBM with the appropriates flags
AC_DEFUN_ONCE([WM_CHECK_LIBM], AC_DEFUN_ONCE([WM_CHECK_LIBM],
[AC_CHECK_FUNC(atan, [AC_CHECK_HEADER([math.h], [],
[AC_MSG_ERROR([header for math library not found])])
AC_CHECK_FUNC(atan,
[LIBM=], [LIBM=],
[AC_CHECK_LIB(m, [atan], [AC_CHECK_LIB(m, [atan],
[LIBM=-lm], [LIBM=-lm],