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gtk/fallback-c89.c: Add C89 fallback for trunc()
Check for trunc() during configure and provide a fallback implementation for it if it is not found.
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@ -209,6 +209,11 @@
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/* Define to 1 if you have the <sys/types.h> header file. */
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#define HAVE_SYS_TYPES_H 1
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/* Define to 1 if trunc() is available */
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#if !defined (_MSC_VER) || (_MSC_VER >= 1800)
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# define HAVE_TRUNC 1
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#endif
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/* Define to 1 if you have the <unistd.h> header file. */
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#ifndef _MSC_VER
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#define HAVE_UNISTD_H 1
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@ -876,9 +876,10 @@ AC_CHECK_FUNCS(mallinfo)
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AC_CHECK_FUNCS(getresuid)
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AC_TYPE_UID_T
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# Check for round(), rint(), isnan(), isinf() and nearbyint()
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# Check for round(), rint(), isnan() and isinf()
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# Check for log2(), exp2(), nearbyint() and trunc()
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AC_CHECK_LIB(m,round,,)
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AC_CHECK_FUNCS(round rint nearbyint sincos exp2 log2)
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AC_CHECK_FUNCS(round rint nearbyint sincos exp2 log2 trunc)
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AC_CHECK_DECLS([isnan, isinf], [], [], [[#include <math.h>]])
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# Checks for gdkspawn
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@ -106,3 +106,11 @@ exp2 (double x)
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return pow (2.0, x);
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}
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#endif
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#ifndef HAVE_TRUNC
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static inline double
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trunc (double x)
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{
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return (x > 0 ? floor (x) : ceil (x));
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}
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#endif
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