Mercurial > hg > octave-lojdl > gnulib-hg
changeset 944:c692b24364d2
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author | Jim Meyering <jim@meyering.net> |
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date | Mon, 16 Jun 1997 16:45:15 +0000 |
parents | a2c074f0ac0f |
children | c53f4ee5cc1f |
files | m4/putenv.m4 |
diffstat | 1 files changed, 40 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/m4/putenv.m4 @@ -0,0 +1,40 @@ +#serial 1 + +dnl From Jim Meyering. +dnl If you use this macro in a package, you should +dnl add the following two lines to acconfig.h: +dnl /* Define to rpl_putenv if the replacement function should be used. */ +dnl #undef putenv +dnl + +AC_DEFUN(jm_FUNC_PUTENV, +[AC_CACHE_CHECK([for SVID conformant putenv], jm_cv_func_svid_putenv, + [AC_TRY_RUN([ + int + main () + { + /* Put it in env. */ + if (putenv ("CONFTEST_putenv=val")) + exit (1); + + /* Try to remove it. */ + if (putenv ("CONFTEST_putenv")) + exit (1); + + /* Make sure it was deleted. */ + if (getenv ("CONFTEST_putenv") != 0) + exit (1); + + exit (0); + } + ], + jm_cv_func_svid_putenv=yes, + jm_cv_func_svid_putenv=no, + dnl When crosscompiling, assume putenv is broken. + jm_cv_func_svid_putenv=no) + ]) + if test $jm_cv_func_svid_putenv = no; then + LIBOBJS="$LIBOBJS putenv.o" + AC_DEFINE_UNQUOTED(putenv, rpl_putenv) + fi +])