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bpo-42235: [macOS] Use LTO/PGO in build-installer.py with new enough compilers (GH-23079) 

With recent enough compilers we can build binaries with
LTO/PGO on macOS. This patch enables this when building on
macOS 10.15 or later (Xcode 11 or later).
This commit is contained in:
Ronald Oussoren 2021-05-03 05:43:52 +02:00 committed by GitHub
parent 8c598dbb94
commit e08059edef
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2 changed files with 12 additions and 0 deletions
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10
Mac/BuildScript/build-installer.py
View File

@ -436,6 +436,14 @@ def library_recipes():
return result
def compilerCanOptimize():
"""
Return True iff the default Xcode version can use PGO and LTO
"""
# bpo-42235: The version check is pretty conservative, can be
# adjusted after testing
mac_ver = tuple(map(int, platform.mac_ver()[0].split('.')))
return mac_ver >= (10, 15)
# Instructions for building packages inside the .mpkg.
def pkg_recipes():
@ -1176,6 +1184,7 @@ def buildPython():
"%s "
"%s "
"%s "
"%s "
"LDFLAGS='-g -L%s/libraries/usr/local/lib' "
"CFLAGS='-g -I%s/libraries/usr/local/include' 2>&1"%(
shellQuote(os.path.join(SRCDIR, 'configure')),
@ -1188,6 +1197,7 @@ def buildPython():
shellQuote(WORKDIR)[1:-1],))[internalTk()],
(' ', "--with-tcltk-libs='-L%s/libraries/usr/local/lib -ltcl8.6 -ltk8.6'"%(
shellQuote(WORKDIR)[1:-1],))[internalTk()],
(' ', "--enable-optimizations --with-lto")[compilerCanOptimize()],
shellQuote(WORKDIR)[1:-1],
shellQuote(WORKDIR)[1:-1]))

2
Misc/NEWS.d/next/macOS/2020-11-01-17-37-16.bpo-42235.A97_BN.rst Normal file
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@ -0,0 +1,2 @@
``Mac/BuildScript/build-installer.py`` will now use "--enable-optimizations"
and ``--with-lto`` when building on macOS 10.15 or later.