On 16/07/14 17:01, Luca Barbato wrote:
> 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
>
Ping.
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