build: fix host menu config targets using ncurses

On a recent Gentoo Linux installation, invoking `make menuconfig`, `make
kernel_menuconfig` or `make kernel_nconfig` in the build system fails,
whereas for example `make menuconfig` in the kernel tree alone works as
expected.

This is happening because STAGING_PREFIX is not defined when kernel's
{menu,n}config target calls pkg-config from the toolchain/host and thus
pkg-config returns an empty value, and the fallback values in the kernel
config script are applied but those are off and the linking fails.

Solution is to use system's pkg-config for all ncurses based menu config
targets in order to provide proper compiler/linker flags.

Ref: FS#2423
Cc: Thomas Albers <thomas.gameiro@gmail.com>
Tested-by: Stijn Tintel <stijn@linux-ipv6.be>
Tested-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit 965f341aa9fdb6e07d509d02a6ca188af050292a)

diff --git a/Makefile b/Makefile
index ab97eacc9d2bfe9618e9282bcd8f2a4903d02c08..65ee10a84b8d57c5bfed7047f0ed114a78190df1 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,7 @@ $(if $(findstring $(space),$(TOPDIR)),$(error ERROR: The path to the OpenWrt dir
 
 world:
 
+DISTRO_PKG_CONFIG:=$(shell which -a pkg-config | grep -E '\/usr' | head -n 1)
 export PATH:=$(TOPDIR)/staging_dir/host/bin:$(PATH)
 
 ifneq ($(OPENWRT_BUILD),1)

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 36f790f8072a5fb9bf3f6f15adf26ca3e6896f43..e744447b2f50051968850c1b78929090bfd5a7d6 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -99,13 +99,18 @@ prepare-tmpinfo: FORCE
                $(_SINGLE)$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
        fi
 
+ifneq ($(DISTRO_PKG_CONFIG),)
+scripts/config/mconf: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
+endif
 scripts/config/mconf:
        @$(_SINGLE)$(SUBMAKE) -s -C scripts/config all CC="$(HOSTCC_WRAPPER)"
 
 $(eval $(call rdep,scripts/config,scripts/config/mconf))
 
 scripts/config/qconf:
-       @$(_SINGLE)$(SUBMAKE) -s -C scripts/config qconf CC="$(HOSTCC_WRAPPER)"
+       @$(_SINGLE)$(SUBMAKE) -s -C scripts/config qconf \
+               CC="$(HOSTCC_WRAPPER)" \
+               DISTRO-PKG-CONFIG="$(DISTRO_PKG_CONFIG)"
 
 scripts/config/conf:
        @$(_SINGLE)$(SUBMAKE) -s -C scripts/config conf CC="$(HOSTCC_WRAPPER)"
@@ -157,6 +162,10 @@ endif
 kernel_oldconfig: prepare_kernel_conf
        $(_SINGLE)$(NO_TRACE_MAKE) -C target/linux oldconfig
 
+ifneq ($(DISTRO_PKG_CONFIG),)
+kernel_menuconfig: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
+kernel_nconfig: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
+endif
 kernel_menuconfig: prepare_kernel_conf
        $(_SINGLE)$(NO_TRACE_MAKE) -C target/linux menuconfig
 

diff --git a/scripts/config/Makefile b/scripts/config/Makefile
index 8bb62d233c86865442e774deff1378db36f066f6..8b78d5a6824722ac56830bca63db6a0ff2d8fd95 100644 (file)
--- a/scripts/config/Makefile
+++ b/scripts/config/Makefile
@@ -20,8 +20,6 @@ check_lxdialog = $(shell $(SHELL) $(CURDIR)/lxdialog/check-lxdialog.sh -$(1))
 export CFLAGS += -DKBUILD_NO_NLS -I. $(call check_lxdialog,ccflags)
 export CXXFLAGS += -DKBUILD_NO_NLS
 
-DISTRO-PKG-CONFIG := $(shell which -a pkg-config | grep -E '\/usr' | head -n 1)
-
 conf-objs      := conf.o zconf.tab.o
 mconf-objs     := mconf.o zconf.tab.o
 qconf-cxxobjs  := qconf.o