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Use time_macros over unset SOURCE_DATE_EPOCH in ccache 4.2 (unreleased)

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ccache 4.2+ will ignore SOURCE_DATE_EPOCH [1].

  [1]: https://github.com/ccache/ccache/pull/755
This commit is contained in:
Azat Khuzhin 2021-01-10 02:21:10 +03:00
parent fe1c153c6f
commit 0421ab6c80
1 changed files with 14 additions and 5 deletions
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19
cmake/find/ccache.cmake
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@ -32,12 +32,21 @@ if (CCACHE_FOUND AND NOT COMPILER_MATCHES_CCACHE)
if (CCACHE_VERSION VERSION_GREATER "3.2.0" OR NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
message(STATUS "Using ${CCACHE_FOUND} ${CCACHE_VERSION}")
# 4+ ccache respect SOURCE_DATE_EPOCH (always includes it into the hash
# of the manifest) and debian will extract these from d/changelog, and
# makes cache of ccache unusable
# debian (debhlpers) set SOURCE_DATE_EPOCH environment variable, that is
# filled from the debian/changelog or current time.
#
# FIXME: once sloppiness will be introduced for this this can be removed.
if (CCACHE_VERSION VERSION_GREATER "4.0")
# - 4.0+ ccache always includes this environemtn variable into the hash
# of the manifest, which do not allow to use previous cache,
# - 4.2+ ccache ignores SOURCE_DATE_EPOCH under time_macros sloppiness.
#
# So for:
# - 4.2+ time_macros sloppiness is used,
# - 4.0+ will ignore SOURCE_DATE_EPOCH environment variable.
if (CCACHE_VERSION VERSION_GREATER_EQUAL "4.2")
message(STATUS "Use time_macros sloppiness for ccache")
set_property (GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_FOUND} --set-config=sloppiness=time_macros")
set_property (GLOBAL PROPERTY RULE_LAUNCH_LINK "${CCACHE_FOUND} --set-config=sloppiness=time_macros")
elseif (CCACHE_VERSION VERSION_GREATER_EQUAL "4.0")
message(STATUS "Ignore SOURCE_DATE_EPOCH for ccache")
set_property (GLOBAL PROPERTY RULE_LAUNCH_COMPILE "env -u SOURCE_DATE_EPOCH ${CCACHE_FOUND}")
set_property (GLOBAL PROPERTY RULE_LAUNCH_LINK "env -u SOURCE_DATE_EPOCH ${CCACHE_FOUND}")