From 77c7963c7a0f1c455f20520d5c7b1ec9b17a44fb Mon Sep 17 00:00:00 2001
From: Alexander Kanavin <alex.kanavin@gmail.com>
Date: Wed, 23 Dec 2020 19:14:32 +0100
Subject: [PATCH] Makefile: sort all wildcard file list expansions

Otherwise the order is non-deterministic and breaks
reproducible builds.

Upstream-Status: Submitted [https://github.com/facebook/zstd/pull/2895]
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>

---
 programs/Makefile   | 10 +++++-----
 tests/Makefile      |  4 ++--
 tests/fuzz/Makefile |  2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/programs/Makefile b/programs/Makefile
index 599fb02f..2c416467 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -74,11 +74,11 @@ ZSTDLEGACY_DIR := $(ZSTDDIR)/legacy
 
 vpath %.c $(ZSTDLIB_COMMON) $(ZSTDLIB_COMPRESS) $(ZSTDLIB_DECOMPRESS) $(ZDICT_DIR) $(ZSTDLEGACY_DIR)
 
-ZSTDLIB_COMMON_C := $(wildcard $(ZSTDLIB_COMMON)/*.c)
-ZSTDLIB_COMPRESS_C := $(wildcard $(ZSTDLIB_COMPRESS)/*.c)
-ZSTDLIB_DECOMPRESS_C := $(wildcard $(ZSTDLIB_DECOMPRESS)/*.c)
+ZSTDLIB_COMMON_C := $(sort $(wildcard $(ZSTDLIB_COMMON)/*.c))
+ZSTDLIB_COMPRESS_C := $(sort $(wildcard $(ZSTDLIB_COMPRESS)/*.c))
+ZSTDLIB_DECOMPRESS_C := $(sort $(wildcard $(ZSTDLIB_DECOMPRESS)/*.c))
 ZSTDLIB_CORE_SRC := $(ZSTDLIB_DECOMPRESS_C) $(ZSTDLIB_COMMON_C) $(ZSTDLIB_COMPRESS_C)
-ZDICT_SRC := $(wildcard $(ZDICT_DIR)/*.c)
+ZDICT_SRC := $(sort $(wildcard $(ZDICT_DIR)/*.c))
 
 ZSTD_LEGACY_SUPPORT ?= 5
 ZSTDLEGACY_SRC :=
@@ -93,7 +93,7 @@ ZSTDLIB_FULL_SRC = $(sort $(ZSTDLIB_CORE_SRC) $(ZSTDLEGACY_SRC) $(ZDICT_SRC))
 ZSTDLIB_LOCAL_SRC = $(notdir $(ZSTDLIB_FULL_SRC))
 ZSTDLIB_LOCAL_OBJ := $(ZSTDLIB_LOCAL_SRC:.c=.o)
 
-ZSTD_CLI_SRC := $(wildcard *.c)
+ZSTD_CLI_SRC := $(sort $(wildcard *.c))
 ZSTD_CLI_OBJ := $(ZSTD_CLI_SRC:.c=.o)
 
 ZSTD_ALL_SRC = $(ZSTDLIB_LOCAL_SRC) $(ZSTD_CLI_SRC)
diff --git a/tests/Makefile b/tests/Makefile
index 85553007..b71cdba8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -49,7 +49,7 @@ ZSTDDECOMP_FILES := $(ZSTDDIR)/decompress/*.c
 ZSTD_FILES  := $(ZSTDDECOMP_FILES) $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES)
 ZDICT_FILES := $(ZSTDDIR)/dictBuilder/*.c
 
-ZSTD_F1 := $(wildcard $(ZSTD_FILES))
+ZSTD_F1 := $(sort $(wildcard $(ZSTD_FILES)))
 ZSTD_OBJ1 := $(subst $(ZSTDDIR)/common/,zstdm_,$(ZSTD_F1))
 ZSTD_OBJ2 := $(subst $(ZSTDDIR)/compress/,zstdc_,$(ZSTD_OBJ1))
 ZSTD_OBJ3 := $(subst $(ZSTDDIR)/decompress/,zstdd_,$(ZSTD_OBJ2))
@@ -202,7 +202,7 @@ bigdict: $(ZSTDMT_OBJECTS) $(PRGDIR)/datagen.c bigdict.c
 invalidDictionaries : $(ZSTD_OBJECTS) invalidDictionaries.c
 
 legacy : CPPFLAGS += -I$(ZSTDDIR)/legacy -DZSTD_LEGACY_SUPPORT=4
-legacy : $(ZSTD_FILES) $(wildcard $(ZSTDDIR)/legacy/*.c) legacy.c
+legacy : $(ZSTD_FILES) $(sort $(wildcard $(ZSTDDIR)/legacy/*.c)) legacy.c
 
 decodecorpus : LDLIBS += -lm
 decodecorpus : $(filter-out zstdc_zstd_compress.o, $(ZSTD_OBJECTS)) $(ZDICT_FILES) $(PRGDIR)/util.c $(PRGDIR)/timefn.c decodecorpus.c
diff --git a/tests/fuzz/Makefile b/tests/fuzz/Makefile
index ccb574b7..b1cb2935 100644
--- a/tests/fuzz/Makefile
+++ b/tests/fuzz/Makefile
@@ -62,7 +62,7 @@ FUZZ_SRC       := \
 	$(ZSTDCOMP_SRC) \
 	$(ZSTDDICT_SRC) \
 	$(ZSTDLEGACY_SRC)
-FUZZ_SRC := $(wildcard $(FUZZ_SRC))
+FUZZ_SRC := $(sort $(wildcard $(FUZZ_SRC)))
 
 FUZZ_D_OBJ1 := $(subst $(ZSTDDIR)/common/,d_lib_common_,$(FUZZ_SRC))
 FUZZ_D_OBJ2 := $(subst $(ZSTDDIR)/compress/,d_lib_compress_,$(FUZZ_D_OBJ1))