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authorGreg Steuck <greg@nest.cx>2022-07-09 19:07:03 -0700
committerBen Gamari <ben@smart-cactus.org>2022-07-15 22:22:52 -0400
commit06ea642a394c98fa9cfd385b82c2b2105d5783af (patch)
tree3dbfe7c2759c6b614709fdcf4d29fcd33d84a543
parent805a4b1fe0b6679d27089766d50bcaaed3110864 (diff)
downloadhaskell-06ea642a394c98fa9cfd385b82c2b2105d5783af.tar.gz
Suppress extra output from configure check for c++ libraries
(cherry picked from commit ac6a1a1366d6b9c045b3837c832f7e0fa312d42b)
-rw-r--r--m4/fp_find_cxx_std_lib.m44
1 files changed, 2 insertions, 2 deletions
diff --git a/m4/fp_find_cxx_std_lib.m4 b/m4/fp_find_cxx_std_lib.m4
index d0bb3195c6..68ac0e617d 100644
--- a/m4/fp_find_cxx_std_lib.m4
+++ b/m4/fp_find_cxx_std_lib.m4
@@ -19,7 +19,7 @@ unknown
EOF
AC_MSG_CHECKING([C++ standard library flavour])
if "$CXX" -E actest.cpp -o actest.out; then
- if grep "libc++" actest.out; then
+ if grep "libc++" actest.out >/dev/null; then
CXX_STD_LIB_LIBS="c++ c++abi"
p="`"$CXX" --print-file-name libc++.so`"
d="`dirname "$p"`"
@@ -32,7 +32,7 @@ EOF
CXX_STD_LIB_LIB_DIRS="$d"
CXX_STD_LIB_DYN_LIB_DIRS="$d"
AC_MSG_RESULT([libc++])
- elif grep "libstdc++" actest.out; then
+ elif grep "libstdc++" actest.out >/dev/null; then
CXX_STD_LIB_LIBS="stdc++"
p="`"$CXX" --print-file-name libstdc++.so`"
d="`dirname "$p"`"