From ed7bf08186d83cc82d06ed191fea73e9e18174b2 Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Tue, 2 Jan 2024 05:34:17 -0300
Subject: Makefile: Add support for LLVM fuzzer

---
 .gitignore |  5 ++++-
 Makefile   | 19 ++++++++++++++++++-
 deps.mk    | 10 ++++++++++
 mkdeps.sh  |  9 ++++++++-
 4 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index a515310..3bd5ddd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,5 +7,8 @@
 /src/*.c.txt
 /src/*.cat
 /doc/*.[0-9]
-/tests/slurp.o
+/tests/fuzz/*.o
+/tests/fuzz/*.xa
+/tests/fuzz/*.bin
 /tests/fuzz/corpus/
+/tests/slurp.o
diff --git a/Makefile b/Makefile
index 79eda83..45fe1a2 100644
--- a/Makefile
+++ b/Makefile
@@ -53,6 +53,9 @@ sources.o   = $(sources.c:.c=.o)
 sources.to  = $(sources.c:.c=.to)
 sources.xa  = $(sources.c:.c=.xa)
 sources.bin = $(sources.c:.c=.bin)
+fuzz.o      = $(fuzz.c:.c=.o)
+fuzz.xa     = $(fuzz.c:.c=.xa)
+fuzz.bin    = $(fuzz.c:.c=.bin)
 
 sources = \
 	$(sources.c)       \
@@ -79,6 +82,9 @@ derived-assets = \
 	src/main.bin      \
 
 side-assets = \
+	$(fuzz.o)         \
+	$(fuzz.xa)        \
+	$(fuzz.bin)       \
 	src/logerr.c.txt  \
 	src/catalog.c.txt \
 
@@ -91,12 +97,13 @@ all: $(derived-assets)
 
 lib$(NAME).a: $(sources.o)
 src/main.xa:  $(sources.o) src/main.o
+$(fuzz.bin): lib$(NAME).a
 $(manpages) src/config.h: Makefile deps.mk
 $(sources.o) $(sources.to): src/config.h Makefile deps.mk
 tests/slurp.o:              src/config.h Makefile deps.mk
 
 
-lib$(NAME).a $(sources.xa) src/main.xa:
+lib$(NAME).a $(sources.xa) src/main.xa $(fuzz.xa):
 	$(AR) $(ARFLAGS) $@ $?
 
 src/$(NAME).en.cat: src/i18n.bin
@@ -125,6 +132,16 @@ check-unit: $(sources.bin-check)
 check: check-unit
 
 
+
+fuzz.bin-check = $(fuzz.c:.c=.bin-check)
+$(fuzz.bin-check):
+	$(EXEC)$*.bin tests/fuzz/corpus/ $(FUZZFLAGS)
+
+## Run fuzzing targets indefinitely.
+fuzz: $(fuzz.bin-check)
+
+
+
 ## Remove *all* derived artifacts produced during the build.
 ## A dedicated test asserts that this is always true.
 clean:
diff --git a/deps.mk b/deps.mk
index aa56673..80296ec 100644
--- a/deps.mk
+++ b/deps.mk
@@ -11,6 +11,16 @@ manpages.in = $(manpages.en.in)
 catalogs.en.msg = src/pindaiba.en.msg
 catalogs.msg = $(catalogs.en.msg)
 
+fuzz.c = \
+	tests/fuzz/another.c \
+	tests/fuzz/hello.c \
+
+tests/fuzz/another.xa: tests/fuzz/another.o
+tests/fuzz/hello.xa: tests/fuzz/hello.o
+tests/fuzz/another.bin-check: tests/fuzz/another.bin
+tests/fuzz/hello.bin-check: tests/fuzz/hello.bin
+
+
 sources.c = \
 	src/catalog.c \
 	src/hash.c \
diff --git a/mkdeps.sh b/mkdeps.sh
index 1ec12fb..4970dc8 100755
--- a/mkdeps.sh
+++ b/mkdeps.sh
@@ -12,10 +12,17 @@ cfiles() {
 }
 
 export LANG=POSIX.UTF-8
+
 find doc/*.en.*.in 2>/dev/null | sort | varlist 'manpages.en.in' ||:
 echo 'manpages.in = $(manpages.en.in)'
 printf 'catalogs.en.msg = %s\n' "$(find src/ -name '*.msg')"
 echo 'catalogs.msg = $(catalogs.en.msg)'
-echo ''
+printf '\n'
+
+find tests/fuzz/*.c | sort | varlist 'fuzz.c'
+find tests/fuzz/*.c | sort | awk -F. '{ printf "%s.xa: %s.o\n", $1, $1 }'
+find tests/fuzz/*.c | sort | awk -F. '{ printf "%s.bin-check: %s.bin\n", $1, $1 }'
+printf '\n\n'
+
 cfiles | varlist 'sources.c'
 ldev deps $(cfiles)
-- 
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