toolchain: Allow external toolchains to specify libthread-db

We need to let external toolchains be able to specify the path and
specification file to the libthread-db POSIX thread debugging shared
libraries.

This fixes GDB not being able to be installed because it is depending on
libthread-db:

Collected errors:
 * satisfy_dependencies_for: Cannot satisfy the following dependencies
 * for gdb:
 *      libthread-db *
 * opkg_install_cmd: Cannot install package gdb.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
(cherry picked from commit 7f0c95a7dfff8aa0b6f5e3e78263cab108245e4c)

diff --git a/package/libs/toolchain/Makefile b/package/libs/toolchain/Makefile
index 4822ca7be3ba722b174811a5b615052e5f66f1c0..88adb9a8a4158ff38452760cfd52875880c6a3ad 100644 (file)
--- a/package/libs/toolchain/Makefile
+++ b/package/libs/toolchain/Makefile
@@ -202,6 +202,26 @@ $(call Package/libc/Default)
   TITLE:=POSIX thread library debugging support
 endef
 
+define Package/libthread-db/config
+       menu "Configuration"
+       depends on EXTERNAL_TOOLCHAIN && PACKAGE_libthread-db
+
+       config LIBTHREAD_DB_ROOT_DIR
+               string
+               prompt "POSIX thread debugging shared library base directory"
+               depends on EXTERNAL_TOOLCHAIN && PACKAGE_libthread-db
+               default TOOLCHAIN_ROOT  if !NATIVE_TOOLCHAIN
+               default "/"  if NATIVE_TOOLCHAIN
+
+       config LIBTHREAD_DB_FILE_SPEC
+               string
+               prompt "POSIX thread debugging shared library files (use wildcards)"
+               depends on EXTERNAL_TOOLCHAIN && PACKAGE_libthread-db
+               default "./lib/libthread_db{-*.so,.so.*}"
+
+       endmenu
+endef
+
 define Package/librt
 $(call Package/libc/Default)
   TITLE:=POSIX.1b RealTime extension library
@@ -529,6 +549,14 @@ else
        exit 0
   endef
 
+  define Package/libthread-db/install
+       for file in $(call qstrip,$(CONFIG_LIBTHREAD_DB_FILE_SPEC)); do \
+               $(INSTALL_DIR) $(1)/lib ; \
+               $(CP) $(call qstrip,$(CONFIG_LIBTHREAD_DB_ROOT_DIR))/$$$$file $(1)/lib/ ; \
+       done ; \
+       exit 0
+  endef
+
   define Package/librt/install
        for file in $(call qstrip,$(CONFIG_LIBRT_FILE_SPEC)); do \
                $(INSTALL_DIR) $(1)/lib ; \