The options is useful to build position-independent executables on
hardened systems (e.g. Android L and Gentoo Hardened).
---
Makefile | 4 ++--
configure | 9 +++++++++
doc/platform.texi | 3 +++
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index 6302997..99d3240 100644
--- a/Makefile
+++ b/Makefile
@@ -104,7 +104,7 @@ FF_DEP_LIBS := $(DEP_LIBS)
all: $(AVPROGS)
$(TOOLS): %$(EXESUF): %.o $(EXEOBJS)
- $(LD) $(LDFLAGS) $(LD_O) $^ $(ELIBS)
+ $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS)
tools/cws2fws$(EXESUF): ELIBS = $(ZLIB)
@@ -149,7 +149,7 @@ endef
$(foreach P,$(PROGS),$(eval $(call DOPROG,$(P:$(EXESUF)=))))
$(PROGS): %$(EXESUF): %.o $(FF_DEP_LIBS)
- $(LD) $(LDFLAGS) $(LD_O) $(OBJS-$*) $(FF_EXTRALIBS)
+ $(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $(OBJS-$*) $(FF_EXTRALIBS)
OBJDIRS += tools
diff --git a/configure b/configure
index ea26029..d78fd56 100755
--- a/configure
+++ b/configure
@@ -244,6 +244,7 @@ Toolchain options:
--host-os=OS compiler host OS [$target_os]
--extra-cflags=ECFLAGS add ECFLAGS to CFLAGS [$CFLAGS]
--extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
+ --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
--extra-libs=ELIBS add ELIBS [$ELIBS]
--extra-version=STRING version string suffix []
--optflags=OPTFLAGS override optimization-related compiler flags
@@ -679,6 +680,10 @@ add_ldflags(){
append LDFLAGS $($ldflags_filter "$@")
}
+add_ldexeflags(){
+ append LDEXEFLAGS $($ldflags_filter "$@")
+}
+
add_stripflags(){
append STRIPFLAGS "$@"
}
@@ -2355,6 +2360,9 @@ for opt do
--extra-ldflags=*)
add_ldflags $optval
;;
+ --extra-ldexeflags=*)
+ add_ldexeflags $optval
+ ;;
--extra-libs=*)
add_extralibs $optval
;;
@@ -4574,6 +4582,7 @@ LD_LIB=$LD_LIB
LD_PATH=$LD_PATH
DLLTOOL=$dlltool
LDFLAGS=$LDFLAGS
+LDEXEFLAGS=$LDEXEFLAGS
SHFLAGS=$(echo $($ldflags_filter $SHFLAGS))
STRIPFLAGS=$STRIPFLAGS
YASMFLAGS=$YASMFLAGS
diff --git a/doc/platform.texi b/doc/platform.texi
index 3ada146..d4a6618 100644
--- a/doc/platform.texi
+++ b/doc/platform.texi
@@ -35,6 +35,9 @@ to your project LDFLAGS:
-Wl,-Bsymbolic
@end example
+If your target platform requires position independent binaries, you should
+pass the correct linking flag (e.g. @code{-pie}) to @code{--extra-ldexeflags}.
+
@section BSD
BSD make will not build Libav, you need to install and use GNU Make
--
1.9.0
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
