From: Justin Pryzby <pryzbyj@telsasoft.com>
Date: Wed, 25 May 2022 22:05:13 -0500
Subject: [PATCH 2/6] cirrus/windows: ccache

ccache 4.7 added support for depend mode with MSVC, and ccache v4.10
supports PCH, so this is now viable.

https://www.postgresql.org/message-id/flat/20220522232606.GZ19626%40telsasoft.com

https://cirrus-ci.com/task/5213936495099904 build 29sec
---
 .cirrus.tasks.yml | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/.cirrus.tasks.yml b/.cirrus.tasks.yml
index 5dd37e07aae..fb4ea3d666a 100644
--- a/.cirrus.tasks.yml
+++ b/.cirrus.tasks.yml
@@ -546,6 +546,12 @@ task:
   env:
     TEST_JOBS: 8 # wild guess, data based value welcome
 
+    CC: c:\msys64\ucrt64\bin\ccache.exe cl.exe
+    CCACHE_DIR: $CIRRUS_WORKING_DIR/.ccache
+    CCACHE_MAXSIZE: "500M"
+    CCACHE_SLOPPINESS: pch_defines,time_macros
+    CCACHE_DEPEND: 1
+
     # Cirrus defaults to SetErrorMode(SEM_NOGPFAULTERRORBOX | ...). That
     # prevents crash reporting from working unless binaries do SetErrorMode()
     # themselves. Furthermore, it appears that either python or, more likely,
@@ -563,6 +569,9 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  ccache_cache:
+    folder: $CCACHE_DIR
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
@@ -570,9 +579,10 @@ task:
     type c:\Windows\System32\Drivers\etc\hosts
 
   # Use /DEBUG:FASTLINK to avoid high memory usage during linking
+  # Use /Z7 to write separate debug files, to allow ccache to work
   configure_script: |
     vcvarsall x64
-    meson setup --backend ninja --buildtype debug -Dc_link_args=/DEBUG:FASTLINK -Dcassert=true -Dinjection_points=true -Db_pch=true -Dextra_lib_dirs=c:\openssl\1.1\lib -Dextra_include_dirs=c:\openssl\1.1\include -DTAR=%TAR% -DPG_TEST_EXTRA="%PG_TEST_EXTRA%" build
+    meson setup build --backend ninja --buildtype debug -Dc_link_args=/DEBUG:FASTLINK -Dcassert=true -Dinjection_points=true -Db_pch=true -Dextra_lib_dirs=c:\openssl\1.1\lib -Dextra_include_dirs=c:\openssl\1.1\include -DTAR=%TAR% -DPG_TEST_EXTRA="%PG_TEST_EXTRA%" -Dc_args="/Z7"
 
   build_script: |
     vcvarsall x64
@@ -581,6 +591,9 @@ task:
     REM without the pipe, exiting now if it fails, to avoid trying to run checks
     ninja -C build > nul
 
+  always:
+    upload_caches: [ccache]
+
   check_world_script: |
     vcvarsall x64
     meson test %MTEST_ARGS% --num-processes %TEST_JOBS%
-- 
2.42.0


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