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| author | Jim Meyering <jim@meyering.net> | 2000-07-09 17:46:11 +0000 |
|---|---|---|
| committer | Jim Meyering <jim@meyering.net> | 2000-07-09 17:46:11 +0000 |
| commit | d2269d5c1b3e4267997bf7aca25439c579638d92 (patch) | |
| tree | a64f66ff6cbe8e12cee14cf0d0811565c3273bd8 /m4/jm-macros.m4 | |
| parent | 0fe0294290d20f949fe86d0459e2dd576c6a9e5f (diff) | |
| download | coreutils-d2269d5c1b3e4267997bf7aca25439c579638d92.tar.xz | |
(jm_MACROS): Add a test to see if -lm is required
to link seq. If so, set SEQ_LIBM to -lm. From Bruno Haible.
Diffstat (limited to 'm4/jm-macros.m4')
| -rw-r--r-- | m4/jm-macros.m4 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4 index 6ed662cfd..b60b6ff22 100644 --- a/m4/jm-macros.m4 +++ b/m4/jm-macros.m4 @@ -188,6 +188,22 @@ AC_DEFUN(jm_MACROS, AC_SUBST(POW_LIBM) test $am_cv_func_strtod_needs_libm = yes && POW_LIBM=-lm + # See if linking `seq' requires -lm. + # It does on nearly every system. The single exception (so far) is + # BeOS which doesn't even have a separate math library. + AC_SUBST(SEQ_LIBM) + ac_seq_body=' + static double x, y; + x = floor (x); + x = rint (x); + x = modf (x, &y);' + AC_TRY_LINK([#include <math.h>], $ac_seq_body, , + [ac_seq_save_LIBS="$LIBS" + LIBS="$LIBS -lm" + AC_TRY_LINK([#include <math.h>], $ac_seq_body, SEQ_LIBM=-lm) + LIBS="$ac_seq_save_LIBS" + ]) + jm_LANGINFO_CODESET jm_GLIBC21 jm_ICONV |