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build: fix mutex detection when building bdb on macOS

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Starting with the Clang shipped with Xcode 12, Apple has enabled
-Werror=implicit-function-declaration by default. This causes bdbs mutex
detection to fail when building on macOS (not cross-compiling):

checking for mutexes... UNIX/fcntl
configure: WARNING: NO SHARED LATCH IMPLEMENTATION FOUND FOR THIS PLATFORM.
configure: error: Unable to find a mutex implementation

as previously emitted warnings are being turned into errors. i.e:

error: implicitly declaring library function 'exit' with type 'void (int) __attribute__((noreturn))' [-Werror,-Wimplicit-function-declaration]

Append -Wno-error=implicit-function-declaration to cflags so that
-Wimplicit-function-declaration returns to being a warning, and the
configure checks will succeed.

Fixes #19411.

Github-Pull: #20195
Rebased-From: d0a829e963
This commit is contained in:
fanquake 2020-10-20 17:10:45 +08:00
parent 1f67a30e83
commit 314e79581f
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depends/packages/bdb.mk
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@ -9,6 +9,7 @@ define $(package)_set_vars
$(package)_config_opts=--disable-shared --enable-cxx --disable-replication --enable-option-checking $(package)_config_opts=--disable-shared --enable-cxx --disable-replication --enable-option-checking
$(package)_config_opts_mingw32=--enable-mingw $(package)_config_opts_mingw32=--enable-mingw
$(package)_config_opts_linux=--with-pic $(package)_config_opts_linux=--with-pic
$(package)_cflags+=-Wno-error=implicit-function-declaration
$(package)_cxxflags=-std=c++11 $(package)_cxxflags=-std=c++11
$(package)_cppflags_mingw32=-DUNICODE -D_UNICODE $(package)_cppflags_mingw32=-DUNICODE -D_UNICODE
endef endef