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Do not turn some compiler warnings into errors by default

We build with --enable-werror during development and in CI. If the code
is built with a different compiler that throws additional warnings, it
should not stop the build.

This patch also effectively removes dependency on autoconf-archive.

Related: OS#5289
Related: SYS#5789
Change-Id: Ie30d8024ee2ad48073dd8be2e02856b6ce1a6b0b
---
M configure.ac
1 file changed, 0 insertions(+), 12 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-hnodeb refs/changes/84/26884/1

diff --git a/configure.ac b/configure.ac
index e96a6a1..9e1e51a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,11 +36,6 @@
 fi
 PKG_PROG_PKG_CONFIG([0.20])
 
-dnl check for AX_CHECK_COMPILE_FLAG
-m4_ifdef([AX_CHECK_COMPILE_FLAG], [], [
-	AC_MSG_ERROR([Please install autoconf-archive; re-run 'autoreconf -fi' for it to take effect.])
-	])
-
 dnl checks for libraries
 AC_SEARCH_LIBS([dlopen], [dl dld], [LIBRARY_DL="$LIBS";LIBS=""])
 AC_SUBST(LIBRARY_DL)
@@ -115,13 +110,6 @@
 CFLAGS="$saved_CFLAGS"
 AC_SUBST(SYMBOL_VISIBILITY)
 
-AX_CHECK_COMPILE_FLAG([-Werror=implicit], [CFLAGS="$CFLAGS -Werror=implicit"])
-AX_CHECK_COMPILE_FLAG([-Werror=maybe-uninitialized], [CFLAGS="$CFLAGS -Werror=maybe-uninitialized"])
-AX_CHECK_COMPILE_FLAG([-Werror=memset-transposed-args], [CFLAGS="$CFLAGS -Werror=memset-transposed-args"])
-AX_CHECK_COMPILE_FLAG([-Wnull-dereference], [CFLAGS="$CFLAGS -Wnull-dereference"])
-AX_CHECK_COMPILE_FLAG([-Werror=sizeof-array-argument], [CFLAGS="$CFLAGS -Werror=sizeof-array-argument"])
-AX_CHECK_COMPILE_FLAG([-Werror=sizeof-pointer-memaccess], [CFLAGS="$CFLAGS -Werror=sizeof-pointer-memaccess"])
-
 # Coverage build taken from WebKit's configure.in
 AC_MSG_CHECKING([whether to enable code coverage support])
 AC_ARG_ENABLE(coverage,

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