From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Each of 'make {menu,n,g,x}config' uses (needs) pkg-config to make sure
that other required files are present and to determine build flags
settings, but none of these check that pkg-config itself is present.
Add a check for all 4 of these targets and update
Documentation/process/changes.rst to mention 'pkg-config'.
Fixes kernel bugzilla #77511:
https://bugzilla.kernel.org/show_bug.cgi?id=77511
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Bjørn Forsman <bjorn.forsman@xxxxxxxxx>
---
v4: apply Masahiro's suggestions
Strictly speaking, pkg-config is not required if someone is only
using 'make {menu,n}config' since there are fallbacks for those
two targets.
Documentation/process/changes.rst | 8 ++++++++
scripts/kconfig/Makefile | 1 +
scripts/kconfig/check-pkgconfig.sh | 8 ++++++++
3 files changed, 17 insertions(+)
--- linux-next-20180628.orig/scripts/kconfig/Makefile
+++ linux-next-20180628/scripts/kconfig/Makefile
@@ -215,6 +215,7 @@ $(obj)/zconf.tab.o: $(obj)/zconf.lex.c
# check if necessary packages are available, and configure build flags
define filechk_conf_cfg
+ $(CONFIG_SHELL) $(srctree)/scripts/kconfig/check-pkgconfig.sh; \
$(CONFIG_SHELL) $<
endef
--- /dev/null
+++ linux-next-20180628/scripts/kconfig/check-pkgconfig.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Check for pkg-config presence
+
+if [ -z $(command -v pkg-config) ]; then
+ echo "'make *config' requires 'pkg-config'. Please install it." 1>&2
+ exit 1
+fi
--- linux-next-20180628.orig/Documentation/process/changes.rst
+++ linux-next-20180628/Documentation/process/changes.rst
@@ -81,6 +81,14 @@ The build system has, as of 4.13, switch
rather than incremental linking (`ld -r`) for built-in.a intermediate steps.
This requires binutils 2.20 or newer.
+pkg-config
+----------
+
+The build system, as of 4.18, requires pkg-config to check for installed
+kconfig tools and to determine flags settings for use in
+'make {menu,n,g,x}config'. Previously pkg-config was being used but not
+verified or documented.
+
Flex
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