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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:44:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:44:05 +0000 |
| commit | d318611dd6f23fcfedd50e9b9e24620b102ba96a (patch) | |
| tree | 8b9eef82ca40fdd5a8deeabf07572074c236095d /gnulib_m4/float_h.m4 | |
| parent | Initial commit. (diff) | |
| download | groff-upstream/1.23.0.tar.xz groff-upstream/1.23.0.zip | |
Adding upstream version 1.23.0.upstream/1.23.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gnulib_m4/float_h.m4')
| -rw-r--r-- | gnulib_m4/float_h.m4 | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gnulib_m4/float_h.m4 b/gnulib_m4/float_h.m4 new file mode 100644 index 0000000..2f0c9c4 --- /dev/null +++ b/gnulib_m4/float_h.m4 @@ -0,0 +1,106 @@ +# float_h.m4 serial 13 +dnl Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FLOAT_H], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) + GL_GENERATE_FLOAT_H=false + REPLACE_FLOAT_LDBL=0 + case "$host_os" in + aix* | beos* | openbsd* | mirbsd* | irix*) + GL_GENERATE_FLOAT_H=true + ;; + freebsd* | dragonfly*) + case "$host_cpu" in +changequote(,)dnl + i[34567]86 ) +changequote([,])dnl + GL_GENERATE_FLOAT_H=true + ;; + x86_64 ) + # On x86_64 systems, the C compiler may still be generating + # 32-bit code. + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE( + [[#if defined __LP64__ || defined __x86_64__ || defined __amd64__ + int ok; + #else + error fail + #endif + ]])], + [], + [GL_GENERATE_FLOAT_H=true]) + ;; + esac + ;; + linux*) + case "$host_cpu" in + powerpc*) + GL_GENERATE_FLOAT_H=true + ;; + esac + ;; + esac + case "$host_os" in + aix* | freebsd* | dragonfly* | linux*) + if $GL_GENERATE_FLOAT_H; then + REPLACE_FLOAT_LDBL=1 + fi + ;; + esac + + dnl Test against glibc-2.7 Linux/SPARC64 bug. + REPLACE_ITOLD=0 + AC_CACHE_CHECK([whether conversion from 'int' to 'long double' works], + [gl_cv_func_itold_works], + [ + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +int i = -1; +volatile long double ld; +int main () +{ + ld += i * 1.0L; + if (ld > 0) + return 1; + return 0; +}]])], + [gl_cv_func_itold_works=yes], + [gl_cv_func_itold_works=no], + [case "$host" in + sparc*-*-linux*) + AC_COMPILE_IFELSE( + [AC_LANG_SOURCE( + [[#if defined __LP64__ || defined __arch64__ + int ok; + #else + error fail + #endif + ]])], + [gl_cv_func_itold_works="guessing no"], + [gl_cv_func_itold_works="guessing yes"]) + ;; + # Guess yes on native Windows. + mingw*) gl_cv_func_itold_works="guessing yes" ;; + *) gl_cv_func_itold_works="guessing yes" ;; + esac + ]) + ]) + case "$gl_cv_func_itold_works" in + *no) + REPLACE_ITOLD=1 + dnl We add the workaround to <float.h> but also to <math.h>, + dnl to increase the chances that the fix function gets pulled in. + GL_GENERATE_FLOAT_H=true + ;; + esac + + if $GL_GENERATE_FLOAT_H; then + gl_NEXT_HEADERS([float.h]) + fi + AC_SUBST([REPLACE_ITOLD]) +]) |