[英]PostgreSQL C Extensions without -Wdeclaration-after-statement
Currently, when I compile my extension I get,目前,当我编译我的扩展时,我得到,
warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
57 | uint32 n = fctx->n;
PostgreSQL currently uses -Wdeclaration-after-statement
during compilation. PostgreSQL 当前在编译期间使用-Wdeclaration-after-statement
。 They set this option specifically in their pgxs
global make file on my machine that's at,他们在我的机器上的pgxs
全局 make 文件中专门设置了这个选项,
/usr/lib/postgresql/13/lib/pgxs/src/Makefile.global
It is set with their CFLAGS
,它是用他们的CFLAGS
设置的,
CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fno-omit-frame-pointer
Is there anyway to disable -Wdeclaration-after-statement
or does every PostgreSQL extension author have to adopt this same convention?无论如何要禁用-Wdeclaration-after-statement
还是每个 PostgreSQL 扩展作者都必须采用相同的约定? Can I override CFLAGS in my extension?我可以在我的扩展中覆盖 CFLAGS 吗?
I was able to squelch these warnings by ending my extension's Makefile
with,我能够通过结束我的扩展的Makefile
来消除这些警告,
$(OBJS): CFLAGS += $(PERMIT_DECLARATION_AFTER_STATEMENT)
Thanks goes out RhodiumToad on ircs://irc.libera.chat:6697/#postgresql
, he goes on to say感谢 RhodiumToad 在ircs://irc.libera.chat:6697/#postgresql
,他继续说
configure tests whether
-Wno-declaration-after-statement
works and sets up that variable accordingly well actually I think it checks for-Wdeclaration-after-statement
and if that works, assumes -Wno-... works too you can put that rule after including$(PGXS)
, so you can make it conditional on$(MAJORVERSION)
if need be or conditional onPERMIT_DECLARATION_AFTER_STATEMENT
being defined配置测试-Wno-declaration-after-statement
有效并相应地设置该变量实际上我认为它会检查-Wdeclaration-after-statement
,如果有效,则假设 -Wno-... 也有效,您可以放置该规则在包含$(PGXS)
,如果需要或以定义PERMIT_DECLARATION_AFTER_STATEMENT
为条件,您可以使其以$(MAJORVERSION)
为条件
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