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link libWINGs against libm if necessary

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libWINGs is using mathematical functions (atan, sqrt, etc.). Check
whether we need to lik against libm to use these and link libWINGs
against it if necessary.
This commit is contained in:
Andreas Metzler
2010-08-01 16:07:22 +02:00
committed by Carlos R. Mafra
parent 3f27b998a7
commit c238d8417f
2 changed files with 12 additions and 1 deletions
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2
WINGs/Makefile.am
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@@ -19,7 +19,7 @@ lib_LTLIBRARIES = libWUtil.la libWINGs.la
LDADD= libWUtil.la libWINGs.la $(top_builddir)/wrlib/libwraster.la @INTLIBS@
libWINGs_la_LIBADD = libWUtil.la $(top_builddir)/wrlib/libwraster.la @XFTLIBS@ @FCLIBS@
libWINGs_la_LIBADD = libWUtil.la $(top_builddir)/wrlib/libwraster.la @XFTLIBS@ @FCLIBS@ @LIBM@
EXTRA_DIST = BUGS make-rgb Examples Extras Tests

11
configure.ac
View File

@@ -481,6 +481,17 @@ if test "$shape" = yes; then
fi
dnl
dnl libWINGS uses math functions, check whether usage requires linking
dnl against libm
dnl
AC_CHECK_FUNC(atan,[mathneedslibm=no;LIBM=],[mathneedslibm=dunno])
if test "x$mathneedslibm" = "xdunno" ; then
AC_CHECK_LIB(m, atan, [LIBM=-lm])
fi
AC_SUBST(LIBM)
dnl
dnl libWINGS uses FcPatternDel from libfontconfig
dnl