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46 lines
1.1 KiB
46 lines
1.1 KiB
15 years ago
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AC_CHECK_HEADERS(ieeefp.h)
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AC_CHECK_FUNCS(fabsl)
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AC_DEFUN([KDE_C_LONG_DOUBLE],
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[
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AC_CACHE_CHECK(for long double, ac_cv_c_long_double,
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[
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AC_TRY_RUN(
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[
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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int main() {
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/* The Stardent Vistra knows sizeof(long double), but does not support it. */
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long double foo = 1.0;
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char buffer[10];
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/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
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int result = (sizeof(long double) < sizeof(double));
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/* the following is needed for a broken printf in glibc2 */
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if (!result) {
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foo = foo * 3;
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sprintf(buffer,"%0.0Lf",foo);
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result = strcmp(buffer, "3");
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/* and now something mean ;-) */
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foo = powl(fabsl(foo), 1);
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}
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exit(result); }
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],
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ac_cv_c_long_double=yes, ac_cv_c_long_double=no,
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ac_cv_c_long_double=no
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)
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])
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if test $ac_cv_c_long_double = yes; then
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AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have support for long double in printf])
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fi
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])
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KDE_C_LONG_DOUBLE
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AC_LANG_C
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KDE_CHECK_LIB(m, isinf, [
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AC_DEFINE_UNQUOTED(HAVE_FUNC_ISINF, 1, [Define if you have isinf])
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])
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