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From: "Carlo Marcelo Arenas Belón" <carenas@gmail.com>
To: git@vger.kernel.org
Cc: j6t@kdbg.org, gitster@pobox.com, avarab@gmail.com,
	jonathantanmy@google.com, ramsay@ramsayjones.plus.com,
	"Carlo Marcelo Arenas Belón" <carenas@gmail.com>
Subject: [PATCH v5 2/3] lazyload.h: use an even more generic function pointer than FARPROC
Date: Tue, 28 Sep 2021 20:19:39 -0700	[thread overview]
Message-ID: <20210929031940.97092-3-carenas@gmail.com> (raw)
In-Reply-To: <20210929031940.97092-1-carenas@gmail.com>

gcc will helpfully raise a -Wcast-function-type warning when casting
between functions that might have incompatible return types
(ex: GetUserNameExW returns bool which is only half the size of the
return type from FARPROC which is long long), so create a new type that
could be used as a completely generic function pointer and cast through
it instead.

Additionaly remove the -Wno-incompatible-pointer-types temporary
flag added in 27e0c3c (win32: allow building with pedantic mode
enabled, 2021-09-03), as it will be no longer needed.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 compat/win32/lazyload.h | 9 ++++++---
 config.mak.dev          | 1 -
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/compat/win32/lazyload.h b/compat/win32/lazyload.h
index 121ee24ed2..2b3637135f 100644
--- a/compat/win32/lazyload.h
+++ b/compat/win32/lazyload.h
@@ -15,10 +15,12 @@
  *                        source, target);
  */
 
+typedef void (*FARVOIDPROC)(void);
+
 struct proc_addr {
 	const char *const dll;
 	const char *const function;
-	FARPROC pfunction;
+	FARVOIDPROC pfunction;
 	unsigned initialized : 1;
 };
 
@@ -38,7 +40,7 @@ struct proc_addr {
 #define INIT_PROC_ADDR(function) \
 	(function = (proc_type_##function)get_proc_addr(&proc_addr_##function))
 
-static inline FARPROC get_proc_addr(struct proc_addr *proc)
+static inline FARVOIDPROC get_proc_addr(struct proc_addr *proc)
 {
 	/* only do this once */
 	if (!proc->initialized) {
@@ -47,7 +49,8 @@ static inline FARPROC get_proc_addr(struct proc_addr *proc)
 		hnd = LoadLibraryExA(proc->dll, NULL,
 				     LOAD_LIBRARY_SEARCH_SYSTEM32);
 		if (hnd)
-			proc->pfunction = GetProcAddress(hnd, proc->function);
+			proc->pfunction = (FARVOIDPROC)GetProcAddress(hnd,
+							proc->function);
 	}
 	/* set ENOSYS if DLL or function was not found */
 	if (!proc->pfunction)
diff --git a/config.mak.dev b/config.mak.dev
index c080ac0231..cdf043c52b 100644
--- a/config.mak.dev
+++ b/config.mak.dev
@@ -12,7 +12,6 @@ DEVELOPER_CFLAGS += -pedantic
 DEVELOPER_CFLAGS += -Wpedantic
 ifneq ($(filter gcc5,$(COMPILER_FEATURES)),)
 DEVELOPER_CFLAGS += -Wno-pedantic-ms-format
-DEVELOPER_CFLAGS += -Wno-incompatible-pointer-types
 endif
 endif
 DEVELOPER_CFLAGS += -Wdeclaration-after-statement
-- 
2.33.0.955.gee03ddbf0e


  parent reply	other threads:[~2021-09-29  3:19 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22 19:56 [PATCH cb/pedantic-build-for-developers] lazyload.h: fix warnings about mismatching function pointer types Johannes Sixt
2021-09-22 20:16 ` Carlo Arenas
2021-09-22 21:21   ` Johannes Sixt
2021-09-23  6:20     ` Carlo Arenas
2021-09-23  6:03 ` [PATCH] lazyload.h: use an even more generic function pointer than FARPROC Carlo Marcelo Arenas Belón
2021-09-23  6:33   ` Johannes Sixt
2021-09-23  6:49     ` Carlo Arenas
2021-09-23  6:52   ` [PATCH v2] " Carlo Marcelo Arenas Belón
2021-09-26 10:05     ` [PATCH v3 0/2] js/win-lazyload-buildfix Carlo Marcelo Arenas Belón
2021-09-26 10:05       ` [PATCH v3 1/2] lazyload.h: fix warnings about mismatching function pointer types Carlo Marcelo Arenas Belón
2021-09-27  2:58         ` Eric Sunshine
2021-09-26 10:05       ` [PATCH v3 2/2] lazyload.h: use an even more generic function pointer than FARPROC Carlo Marcelo Arenas Belón
2021-09-27 16:35         ` Junio C Hamano
2021-09-27 18:50           ` Carlo Arenas
2021-09-27 20:13             ` Junio C Hamano
2021-09-29  0:48       ` [PATCH v4 0/3] js/win-lazyload-buildfix Carlo Marcelo Arenas Belón
2021-09-29  0:48         ` [PATCH v4 1/3] lazyload.h: fix warnings about mismatching function pointer types Carlo Marcelo Arenas Belón
2021-09-29  0:48         ` [PATCH v4 2/3] lazyload.h: use an even more generic function pointer than FARPROC Carlo Marcelo Arenas Belón
2021-09-29  0:48         ` [PATCH v4 3/3] Makefile: restrict -Wpedantic and -Wno-pedantic-ms-format better Carlo Marcelo Arenas Belón
2021-09-29  1:14           ` Ramsay Jones
2021-09-29  3:19         ` [PATCH v5 0/3] js/win-lazyload-buildfix Carlo Marcelo Arenas Belón
2021-09-29  3:19           ` [PATCH v5 1/3] lazyload.h: fix warnings about mismatching function pointer types Carlo Marcelo Arenas Belón
2021-09-29  3:19           ` Carlo Marcelo Arenas Belón [this message]
2021-09-29  3:19           ` [PATCH v5 3/3] Makefile: restrict -Wpedantic and -Wno-pedantic-ms-format better Carlo Marcelo Arenas Belón
2021-09-23 21:00 ` [PATCH cb/pedantic-build-for-developers] lazyload.h: fix warnings about mismatching function pointer types Carlo Arenas

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