Allow user to specify own readelf. Use detected readelf,
not 'readelf'.
Noticed when was building elfutils on tuple-prefixed toolchain:
```
checking whether the compiler generates build-ids...
./configure: line 5197: readelf: command not found
no
```
Signed-off-by: Sergei Trofimovich <sly...@gentoo.org>
---
configure.ac | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 74cc749d..8d3bcb7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -200,7 +200,7 @@ fi
# We really want build-ids. Warn and force generating them if gcc was
# configure without --enable-linker-build-id
AC_CACHE_CHECK([whether the compiler generates build-ids], ac_cv_buildid, [dnl
-AC_LINK_IFELSE([AC_LANG_PROGRAM()],[ac_cv_buildid=yes; readelf -n
conftest$EXEEXT | grep -q NT_GNU_BUILD_ID ||
ac_cv_buildid=no],AC_MSG_FAILURE([unexpected compile failure]))])
+AC_LINK_IFELSE([AC_LANG_PROGRAM()],[ac_cv_buildid=yes; $READELF -n
conftest$EXEEXT | grep -q NT_GNU_BUILD_ID ||
ac_cv_buildid=no],AC_MSG_FAILURE([unexpected compile failure]))])
if test "$ac_cv_buildid" = "no"; then
AC_MSG_WARN([compiler doesn't generate build-id by default])
LDFLAGS="$LDFLAGS -Wl,--build-id"
--
2.27.0
