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79 lines
1.8 KiB
79 lines
1.8 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_save_LIBS="$LIBS"
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LIBS="-lm $LIBS"
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AC_TRY_RUN(
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[
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#define _ISOC99_SOURCE 1
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#define _GNU_SOURCE 1
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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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LIBS="$ac_save_LIBS"
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])
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if test $ac_cv_c_long_double = yes; then
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AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have support for long double in printf])
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fi
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])
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KDE_C_LONG_DOUBLE
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have_l_funcs=yes
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AC_CHECK_LIB(m, asinl,,have_l_funcs=no)
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AC_CHECK_LIB(m, sqrtl,,have_l_funcs=no)
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if test "xyes" = "x$have_l_funcs" ; then
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AC_DEFINE(HAVE_L_FUNCS,1,[Define if you have *l math functions (absl, ...)])
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fi
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AC_LANG_C
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AC_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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AC_CHECK_LIB(m, round, [
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AC_DEFINE_UNQUOTED(HAVE_FUNC_ROUND, 1, [Define if you have round])
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])
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AC_CHECK_LIB(m, roundl, [
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AC_DEFINE_UNQUOTED(HAVE_FUNC_ROUNDL, 1, [Define if you have round])
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])
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kcalc_gmp_found=yes
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LIBGMP=
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KDE_CHECK_HEADER([gmp.h], [
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KDE_CHECK_LIB(gmp, main, [
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LIBGMP="-lgmp"
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AC_DEFINE(HAVE_GMP, 1, [Define if you have libgmp])
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])
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],[
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DO_NOT_COMPILE="kcalc $DO_NOT_COMPILE"
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kcalc_gmp_found=no
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]
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)
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AC_SUBST(LIBGMP)
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