Explicitly check whether ar supports the @file syntax

[ghc-hetmet.git] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index a9bdcea..031145d 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -399,6 +399,32 @@ AC_SUBST([ArIsGNUAr], [`echo $fp_prog_ar_is_gnu | tr 'a-z' 'A-Z'`])
 ])# FP_PROG_AR_IS_GNU
 
 
+# FP_PROG_AR_SUPPORTS_ATFILE
+# -----------------
+# Sets fp_prog_ar_supports_atfile to yes or no, depending on whether
+# or not it supports the @file syntax
+AC_DEFUN([FP_PROG_AR_SUPPORTS_ATFILE],
+[AC_REQUIRE([FP_PROG_AR])
+ AC_REQUIRE([FP_PROG_AR_ARGS])
+AC_CACHE_CHECK([whether $fp_prog_ar_raw supports @file], [fp_cv_prog_ar_supports_atfile],
+[
+rm -f conftest*
+touch conftest.file
+echo conftest.file  > conftest.atfile
+echo conftest.file >> conftest.atfile
+"$fp_prog_ar_raw" $fp_prog_ar_args conftest.a @conftest.atfile > /dev/null 2>&1
+fp_prog_ar_supports_atfile_tmp=`"$fp_prog_ar_raw" t conftest.a 2> /dev/null | grep -c conftest.file`
+rm -f conftest*
+if test "$fp_prog_ar_supports_atfile_tmp" -eq 2
+then
+  fp_cv_prog_ar_supports_atfile=yes
+else
+  fp_cv_prog_ar_supports_atfile=no
+fi])
+fp_prog_ar_supports_atfile=$fp_cv_prog_ar_supports_atfile
+AC_SUBST([ArSupportsAtFile], [`echo $fp_prog_ar_supports_atfile | tr 'a-z' 'A-Z'`])
+])# FP_PROG_AR_SUPPORTS_ATFILE
+
 # FP_PROG_AR_ARGS
 # ---------------
 # Sets fp_prog_ar_args to the arguments for ar and the output variable ArCmd