From: Aurelien Jacobs <redacted>
Date: Sat, 21 May 2016 17:46:14 +0000 (+0200)
Subject: detect the appropriate link flag for retaining all objects of static lib
X-Git-Tag: libsigrok-0.5.0~370
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=d268866d294f8ab94e14881caf5d0126e5b77a91;p=libsigrok.git

detect the appropriate link flag for retaining all objects of static lib

This closes bug #802.
---

diff --git a/configure.ac b/configure.ac
index c5089f1d..a089c9aa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -174,6 +174,18 @@ AM_CONDITIONAL([NEED_RPC], [test "x$sr_cv_have_rpc" = xyes])
 # Check for compiler support of 128 bit integers
 AC_CHECK_TYPES([__int128_t, __uint128_t], [], [], [])
 
+# Linker flag to retain the objects of a static lib that are not referenced
+AX_CHECK_LINK_FLAG([-Wl,--whole-archive -Wl,--no-whole-archive],
+                   [SR_LINK_BEFORE_LIB=-Wl,--whole-archive
+                    SR_LINK_AFTER_LIB=-Wl,--no-whole-archive], [
+AX_CHECK_LINK_FLAG([-Wl,-force_load],
+                   [SR_LINK_BEFORE_LIB=-Wl,-force_load
+                    SR_LINK_AFTER_LIB=],
+                   [SR_LINK_BEFORE_LIB=
+                    SR_LINK_AFTER_LIB=])])
+AC_SUBST(SR_LINK_BEFORE_LIB)
+AC_SUBST(SR_LINK_AFTER_LIB)
+
 ########################
 ##  Hardware drivers  ##
 ########################
diff --git a/libsigrok.pc.in b/libsigrok.pc.in
index eb4b7cf8..47ac8801 100644
--- a/libsigrok.pc.in
+++ b/libsigrok.pc.in
@@ -9,6 +9,6 @@ URL: http://www.sigrok.org
 Requires: glib-2.0
 Requires.private: @SR_PKGLIBS@
 Version: @SR_PACKAGE_VERSION@
-Libs: -L${libdir} -Wl,--whole-archive -lsigrok -Wl,--no-whole-archive
+Libs: -L${libdir} @SR_LINK_BEFORE_LIB@ -lsigrok @SR_LINK_AFTER_LIB@
 Libs.private: @SR_EXTRA_LIBS@
 Cflags: -I${includedir}