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Define EXEC_BACKEND in pg_config_manual.h

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It was for unclear reasons defined in a separate location, which makes
it more cumbersome to override for testing, and it also did not have
any prominent documentation.  Move to pg_config_manual.h, where
similar things are already collected.

The previous definition on the command-line had the effect of defining
it to the value 1, but now that we don't need that anymore we just
define it to empty, to simplify manual editing a bit.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/b7053ba8-b008-5335-31de-2fe4fe41ef0f%402ndquadrant.com
This commit is contained in:
Peter Eisentraut 2020-03-25 14:23:25 +01:00
parent e8b1774fc2
commit f5817595a7
4 changed files with 16 additions and 3 deletions
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2
configure vendored
View File

@ -6906,7 +6906,7 @@ fi
# We already have this in Makefile.win32, but configure needs it too
if test "$PORTNAME" = "win32"; then
CPPFLAGS="$CPPFLAGS -I$srcdir/src/include/port/win32 -DEXEC_BACKEND"
CPPFLAGS="$CPPFLAGS -I$srcdir/src/include/port/win32"
fi
# Now that we're done automatically adding stuff to C[XX]FLAGS, put back the

2
configure.in
View File

@ -600,7 +600,7 @@ fi
# We already have this in Makefile.win32, but configure needs it too
if test "$PORTNAME" = "win32"; then
CPPFLAGS="$CPPFLAGS -I$srcdir/src/include/port/win32 -DEXEC_BACKEND"
CPPFLAGS="$CPPFLAGS -I$srcdir/src/include/port/win32"
fi
# Now that we're done automatically adding stuff to C[XX]FLAGS, put back the

13
src/include/pg_config_manual.h
View File

@ -122,6 +122,19 @@
*/
#define ALIGNOF_BUFFER 32
/*
* If EXEC_BACKEND is defined, the postmaster uses an alternative method for
* starting subprocesses: Instead of simply using fork(), as is standard on
* Unix platforms, it uses fork()+exec() or something equivalent on Windows,
* as well as lots of extra code to bring the required global state to those
* new processes. This must be enabled on Windows (because there is no
* fork()). On other platforms, it's only useful for verifying those
* otherwise Windows-specific code paths.
*/
#if defined(WIN32) && !defined(__CYGWIN__)
#define EXEC_BACKEND
#endif
/*
* Disable UNIX sockets for certain operating systems.
*/

2
src/tools/msvc/MSBuildProject.pm
View File

@ -320,7 +320,7 @@ sub WriteItemDefinitionGroup
<ClCompile>
<Optimization>$p->{opt}</Optimization>
<AdditionalIncludeDirectories>$self->{prefixincludes}src/include;src/include/port/win32;src/include/port/win32_msvc;$includes\%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<PreprocessorDefinitions>WIN32;_WINDOWS;__WINDOWS__;__WIN32__;EXEC_BACKEND;WIN32_STACK_RLIMIT=4194304;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE$self->{defines}$p->{defs}\%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>WIN32;_WINDOWS;__WINDOWS__;__WIN32__;WIN32_STACK_RLIMIT=4194304;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE$self->{defines}$p->{defs}\%(PreprocessorDefinitions)</PreprocessorDefinitions>
<StringPooling>$p->{strpool}</StringPooling>
<RuntimeLibrary>$p->{runtime}</RuntimeLibrary>
<DisableSpecificWarnings>$self->{disablewarnings};\%(DisableSpecificWarnings)</DisableSpecificWarnings>