Add SYSROOT, EXTRA_{LDFLAGS,LDLIBS} config opts; sample Android NDK config

Signed-off-by: Rob Walker <rwalker@rwalker.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/Config.in b/Config.in
index 79fe8ff9a..17bdc895a 100644
--- a/Config.in
+++ b/Config.in
@@ -600,12 +600,39 @@ config CROSS_COMPILER_PREFIX
 
           Native builds leave this empty.
 
+config SYSROOT
+        string "Path to sysroot"
+        default ""
+        help
+          If you want to build BusyBox with a cross compiler, then you
+          might also need to specify where /usr/include and /usr/lib
+          will be found.
+
+          For example, BusyBox can be built against an installed
+          Android NDK, platform version 9, for ARM ABI with
+
+          CONFIG_SYSROOT=/opt/android-ndk/platforms/android-9/arch-arm
+
+          Native builds leave this empty.
+
 config EXTRA_CFLAGS
         string "Additional CFLAGS"
         default ""
         help
           Additional CFLAGS to pass to the compiler verbatim.
 
+config EXTRA_LDFLAGS
+        string "Additional LDFLAGS"
+        default ""
+        help
+          Additional LDFLAGS to pass to the linker verbatim.
+
+config EXTRA_LDLIBS
+        string "Additional LDLIBS"
+        default ""
+        help
+          Additional LDLIBS to pass to the linker with -l.
+
 endmenu
 
 menu 'Debugging Options'