From: Aki Tuomi <aki.tuomi@dovecot.fi>
Date: Fri, 24 Nov 2017 06:51:14 +0000 (+0200)
Subject: configure: Detect --whole-archive in linker
X-Git-Tag: 2.3.0.rc1~337
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83b6900e51c8f08d6eadb4b2856c736cc1e142ff;p=thirdparty%2Fdovecot%2Fcore.git

configure: Detect --whole-archive in linker
---

diff --git a/configure.ac b/configure.ac
index 99273fc6b1..a7b7b029c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -322,6 +322,7 @@ AC_CC_PIE
 AC_CC_F_STACK_PROTECTOR
 AC_CC_D_FORTIFY_SOURCE
 AC_LD_RELRO
+AC_LD_WHOLE_ARCHIVE
 
 DOVECOT_CFLAGS
 
diff --git a/m4/ld_whole_archive.m4 b/m4/ld_whole_archive.m4
new file mode 100644
index 0000000000..42a4206e9f
--- /dev/null
+++ b/m4/ld_whole_archive.m4
@@ -0,0 +1,19 @@
+AC_DEFUN([AC_LD_WHOLE_ARCHIVE], [
+    LD_WHOLE_ARCHIVE=
+    LD_NO_WHOLE_ARCHIVE=
+    AC_MSG_CHECKING([for linker option to include whole archive])
+    ld_help="`$CC -Wl,-help 2>&1`"
+    case "$ld_help" in
+        *"--whole-archive"*)
+            LD_WHOLE_ARCHIVE="--whole-archive"
+            LD_NO_WHOLE_ARCHIVE="--no-whole-archive"
+        ;;
+    esac
+    AS_IF([test "x$LD_WHOLE_ARCHIVE" != "x"],
+      [AC_MSG_RESULT([-Wl,$LD_WHOLE_ARCHIVE])],
+      [AC_MSG_RESULT([not supported])]
+    )
+    AC_SUBST([LD_WHOLE_ARCHIVE])
+    AC_SUBST([LD_NO_WHOLE_ARCHIVE])
+    AM_CONDITIONAL([HAVE_WHOLE_ARCHIVE], [test "x$LD_WHOLE_ARCHIVE" != "x"])
+])