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From: "Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
	ramsay@ramsayjones.plus.com, larsxschneider@gmail.com,
	"Eric Sunshine" <sunshine@sunshineco.com>,
	"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
Subject: [PATCH v3 0/3] Enable more compiler warnings for devs
Date: Thu, 29 Mar 2018 17:03:19 +0200	[thread overview]
Message-ID: <20180329150322.10722-1-pclouds@gmail.com> (raw)
In-Reply-To: <20180324125348.6614-1-pclouds@gmail.com>

v3 fixes the fallthru warnings in connect.c, and with json-writer
series rerolled, 'pu' should build cleanly now.
-Wno-maybe-uninitialized is removed, thanks to Ramsay.

v3 also adds an experimental patch that adds EAGER_DEVELOPER=1. These
developers will have all warnings enabled (nothing is suppressed) but
they are not fatal. They could go through them and perhaps clean up
the code base a bit more.

Interdiff

diff --git a/Makefile b/Makefile
index e6680a8977..e4f04ce1cb 100644
--- a/Makefile
+++ b/Makefile
@@ -434,7 +434,9 @@ all::
 #
 # Define DEVELOPER to enable more compiler warnings. Compiler version
 # and faimily are auto detected, but could be overridden by defining
-# COMPILER_FEATURES (see config.mak.dev)
+# COMPILER_FEATURES (see config.mak.dev).
+# Define EAGER_DEVELOPER keeps compiler warnings non-fatal, but no warning
+# class is suppressed anymore.
 
 GIT-VERSION-FILE: FORCE
 	@$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -1041,6 +1043,9 @@ include config.mak.uname
 -include config.mak.autogen
 -include config.mak
 
+ifdef EAGER_DEVELOPER
+DEVELOPER = Yes
+endif
 ifdef DEVELOPER
 include config.mak.dev
 endif
diff --git a/config.mak.dev b/config.mak.dev
index d8beaf9347..13883410b3 100644
--- a/config.mak.dev
+++ b/config.mak.dev
@@ -1,4 +1,6 @@
+ifndef EAGER_DEVELOPER
 CFLAGS += -Werror
+endif
 CFLAGS += -Wdeclaration-after-statement
 CFLAGS += -Wno-format-zero-length
 CFLAGS += -Wold-style-definition
@@ -18,13 +20,23 @@ endif
 
 ifneq ($(or $(filter gcc6,$(COMPILER_FEATURES)),$(filter clang4,$(COMPILER_FEATURES))),)
 CFLAGS += -Wextra
+# if a function is public, there should be a prototype and the right
+# header file should be included. If not, it should be static.
 CFLAGS += -Wmissing-prototypes
+ifndef EAGER_DEVELOPER
+# These are disabled because we have these all over the place.
 CFLAGS += -Wno-empty-body
 CFLAGS += -Wno-missing-field-initializers
 CFLAGS += -Wno-sign-compare
 CFLAGS += -Wno-unused-function
 CFLAGS += -Wno-unused-parameter
-ifneq ($(filter gcc6,$(COMPILER_FEATURES)),)
-CFLAGS += -Wno-maybe-uninitialized
+endif
+endif
+
+# uninitialized warnings on gcc 4.9.2 in xdiff/xdiffi.c and config.c
+# not worth fixing since newer compilers correctly stop complaining
+ifneq ($(filter gcc4,$(COMPILER_FEATURES)),)
+ifeq ($(filter gcc5,$(COMPILER_FEATURES)),)
+CFLAGS += -Wno-uninitialized
 endif
 endif
diff --git a/connect.c b/connect.c
index c3a014c5ba..49eca46462 100644
--- a/connect.c
+++ b/connect.c
@@ -46,7 +46,7 @@ int check_ref_type(const struct ref *ref, int flags)
 	return check_ref(ref->name, flags);
 }
 
-static void die_initial_contact(int unexpected)
+static NORETURN void die_initial_contact(int unexpected)
 {
 	if (unexpected)
 		die(_("The remote end hung up upon initial contact"));


Nguyễn Thái Ngọc Duy (3):
  connect.c: mark die_initial_contact() NORETURN
  Makefile: detect compiler and enable more warnings in DEVELOPER=1
  Makefile: add EAGER_DEVELOPER mode

 Makefile        | 20 +++++++++----------
 config.mak.dev  | 42 +++++++++++++++++++++++++++++++++++++++
 connect.c       |  2 +-
 detect-compiler | 53 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 106 insertions(+), 11 deletions(-)
 create mode 100644 config.mak.dev
 create mode 100755 detect-compiler

-- 
2.17.0.rc1.439.gca064e2955


  parent reply	other threads:[~2018-03-29 15:03 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-03  1:46 [PATCH] travis-ci: enable more warnings on travis linux-gcc job Nguyễn Thái Ngọc Duy
2018-03-16 19:33 ` [PATCH v2] " Nguyễn Thái Ngọc Duy
2018-03-16 21:22   ` Jeff King
2018-03-17  8:01     ` Duy Nguyen
2018-03-17 14:29       ` Lars Schneider
2018-03-17 14:59         ` Duy Nguyen
2018-03-17 16:08           ` Jeff King
2018-03-17 16:12             ` Jeff King
2018-03-17 23:50             ` Junio C Hamano
2018-03-18  8:18             ` [PATCH] Makefile: detect compiler and enable more warnings in DEVELOPER=1 Nguyễn Thái Ngọc Duy
2018-03-18  9:06               ` Eric Sunshine
2018-03-18  9:17                 ` Duy Nguyen
2018-03-18  9:20                   ` Jeff King
2018-03-18  9:24                   ` Eric Sunshine
2018-03-18  9:28                 ` Jeff King
2018-03-18  9:37                   ` Eric Sunshine
2018-03-18  9:26               ` Jeff King
2018-03-18  9:45                 ` Duy Nguyen
2018-03-18 15:55               ` Duy Nguyen
2018-03-18 18:56                 ` Ramsay Jones
2018-03-19 16:30                   ` Duy Nguyen
2018-03-20  5:32                 ` Jeff King
2018-03-24 12:53               ` [PATCH v2] " Nguyễn Thái Ngọc Duy
2018-03-25  0:40                 ` Eric Sunshine
2018-03-26 22:02                 ` Junio C Hamano
2018-03-27 15:03                   ` Duy Nguyen
2018-03-27 16:52                     ` Junio C Hamano
2018-03-29 15:03                 ` Nguyễn Thái Ngọc Duy [this message]
2018-03-29 15:03                   ` [PATCH v3 1/3] connect.c: mark die_initial_contact() NORETURN Nguyễn Thái Ngọc Duy
2018-03-29 15:03                   ` [PATCH v3 2/3] Makefile: detect compiler and enable more warnings in DEVELOPER=1 Nguyễn Thái Ngọc Duy
2018-03-29 15:03                   ` [PATCH v3 3/3] Makefile: add EAGER_DEVELOPER mode Nguyễn Thái Ngọc Duy
2018-03-31 16:40                   ` [PATCH 4/3] Makefile: untangle DEVELOPER and -Werror Ævar Arnfjörð Bjarmason
2018-03-31 18:36                     ` Duy Nguyen
2018-04-03  9:19                       ` Ævar Arnfjörð Bjarmason
2018-04-03 15:17                         ` Duy Nguyen
2018-04-06 21:42                           ` Jeff King
2018-04-07  9:52                             ` Duy Nguyen
2018-04-07 12:36                               ` Ævar Arnfjörð Bjarmason
2018-04-07 17:03                                 ` Duy Nguyen
2018-04-07 18:38                                   ` Ævar Arnfjörð Bjarmason
2018-04-14 19:19                   ` [PATCH v4 0/4] Make DEVELOPER more more flexible with DEVOPTS Ævar Arnfjörð Bjarmason
2018-04-16  4:57                     ` Junio C Hamano
2018-04-14 19:19                   ` [PATCH v4 1/4] connect.c: mark die_initial_contact() NORETURN Ævar Arnfjörð Bjarmason
2018-04-14 19:19                   ` [PATCH v4 2/4] Makefile: detect compiler and enable more warnings in DEVELOPER=1 Ævar Arnfjörð Bjarmason
2018-04-14 19:19                   ` [PATCH v4 3/4] Makefile: add a DEVOPTS to suppress -Werror under DEVELOPER Ævar Arnfjörð Bjarmason
2018-04-14 19:19                   ` [PATCH v4 4/4] Makefile: add a DEVOPTS to get all of -Wextra Ævar Arnfjörð Bjarmason
2018-03-17 15:16         ` [PATCH v2] travis-ci: enable more warnings on travis linux-gcc job Jeff King

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