From 93d623fdf9bee70bfae50168ac163825361f38e0 Mon Sep 17 00:00:00 2001
From: "Kelvin M. Klann" <kmk3.code@protonmail.com>
Date: Fri, 23 Feb 2024 18:09:05 -0300
Subject: build: allow overriding certain tools

Allow overriding the following tools at configure-time and build-time:

* codespell
* cppcheck
* gawk
* scan-build

For example, instead of hardcoding `gawk`, enable overriding it at
configure-time with:

    ./configure GAWK=/path/to/gawk

To override it for a single `make` invocation:

    make GAWK=/path/to/gawk

Also, add default values for the programs that are not found (rather
than leaving the variables empty), to make error messages clearer when
trying to run them:

    $ make CPPCHECK= cppcheck-old
    [...]
    force --error-exitcode=1 --enable=warning,performance .
    make: force: No such file or directory
    $ make CPPCHECK=cppcheck cppcheck-old
    [...]
    cppcheck --force --error-exitcode=1 --enable=warning,performance .
    make: cppcheck: No such file or directory
---
 src/bash_completion/Makefile | 2 +-
 src/man/Makefile             | 2 +-
 src/zsh_completion/Makefile  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/bash_completion/Makefile b/src/bash_completion/Makefile
index 1df030da3..c7ef6afc6 100644
--- a/src/bash_completion/Makefile
+++ b/src/bash_completion/Makefile
@@ -6,7 +6,7 @@ ROOT = ../..
 all: firejail.bash_completion
 
 firejail.bash_completion: firejail.bash_completion.in $(ROOT)/config.mk
-	gawk -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
+	$(GAWK) -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
 	sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
 	rm $@.tmp
 
diff --git a/src/man/Makefile b/src/man/Makefile
index 526ed7fcb..1c1fd49a5 100644
--- a/src/man/Makefile
+++ b/src/man/Makefile
@@ -13,7 +13,7 @@ all: $(TARGET)
 # foo.1: foo.1.in
 $(MOD_DIR)/%: $(MOD_DIR)/%.in $(ROOT)/config.mk
 	@printf 'Generating %s from %s\n' $@ $<
-	@gawk -f $(MOD_DIR)/preproc.awk -- $(MANFLAGS) <$< | \
+	@$(GAWK) -f $(MOD_DIR)/preproc.awk -- $(MANFLAGS) <$< | \
 	  $(MOD_DIR)/mkman.sh $(VERSION) >$@
 
 # foo.1.gz: foo.1
diff --git a/src/zsh_completion/Makefile b/src/zsh_completion/Makefile
index bf83877fb..e964d39ec 100644
--- a/src/zsh_completion/Makefile
+++ b/src/zsh_completion/Makefile
@@ -6,7 +6,7 @@ ROOT = ../..
 all: _firejail
 
 _firejail: _firejail.in $(ROOT)/config.mk
-	gawk -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
+	$(GAWK) -f ../man/preproc.awk -- $(MANFLAGS) < $< > $@.tmp
 	sed "s|_SYSCONFDIR_|$(sysconfdir)|" < $@.tmp > $@
 	rm $@.tmp
 
-- 
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