configure.ac: Segregate checks by source language better.

[catacomb] / configure.ac

diff --git a/configure.ac b/configure.ac
index 631f783..f5d004f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -130,15 +130,13 @@ case $CPUFAM in
   *) AC_MSG_RESULT([$CPUFAM/$ABI]) ;;
 esac
 
-dnl Some equipment wanted for checking CPU features at runtime.
-AC_CHECK_HEADERS([asm/hwcap.h])
-AC_CHECK_HEADERS([sys/auxv.h])
-AC_CHECK_HEADERS([linux/auxvec.h])
-AC_CHECK_FUNCS([getauxval])
-
 dnl--------------------------------------------------------------------------
 dnl C programming environment.
 
+AC_LANG([C])
+
+CATACOMB_LIBS=
+
 dnl Find out if we're cross-compiling.
 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
 
@@ -160,6 +158,12 @@ AC_CHECK_HEADERS([stdint.h])
 AC_SUBST([have_stdint_h])
 AC_C_LONG_LONG
 
+dnl Some equipment wanted for checking CPU features at runtime.
+AC_CHECK_HEADERS([asm/hwcap.h])
+AC_CHECK_HEADERS([sys/auxv.h])
+AC_CHECK_HEADERS([linux/auxvec.h])
+AC_CHECK_FUNCS([getauxval])
+
 dnl Find the bit lengths of the obvious integer types.  This will be useful
 dnl when deciding on a representation for multiprecision integers.
 type_bits="" type_bits_sep=""
@@ -222,6 +226,14 @@ AC_SUBST([limits])
 dnl Functions used for noise-gathering.
 AC_CHECK_FUNCS([setgroups])
 AC_CHECK_HEADERS([linux/random.h])
+mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
+AC_SEARCH_LIBS([clock_gettime], [rt])
+CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
+if test "$ac_cv_search_clock_gettime" != no; then
+  AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
+           [Define if you have the \`clock_gettime' function.])
+fi
+AC_CHECK_FUNCS([getentropy])
 AC_CACHE_CHECK([whether the freewheel noise generator will work],
        [catacomb_cv_freewheel],
 [AC_TRY_LINK(
@@ -249,6 +261,9 @@ LIBS=$mdw_ORIG_LIBS
 dnl Memory locking support.
 AC_CHECK_FUNCS([mlock])
 
+dnl Set the master libraries we need.
+AC_SUBST([CATACOMB_LIBS])
+
 dnl Necessary support libraries.
 PKG_CHECK_MODULES([mLib], [mLib >= 2.2.2.1])
 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"