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Merge pull request #4216 from bfredl/rebuild

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build system: avoid more unneccesary recompiles
This commit is contained in:
Björn Linse 2016-02-14 12:07:55 +01:00
commit 75f6817a51
1 changed files with 16 additions and 15 deletions
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31
scripts/gendeclarations.lua
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@ -239,23 +239,24 @@ end
non_static = non_static .. footer
static = static .. footer
local F
F = io.open(static_fname, 'w')
F:write(static)
F:close()
-- Before generating the non-static headers, check if the current file(if
-- exists) is different from the new one. If they are the same, we won't touch
-- the current version to avoid triggering an unnecessary rebuilds of modules
-- Before generating the headers, check if the current file (if exists) is
-- different from the new one. If they are the same, we won't touch the
-- current version to avoid triggering an unnecessary rebuilds of modules
-- that depend on this one
F = io.open(non_static_fname, 'r')
if F ~= nil then
if F:read('*a') == non_static then
os.exit(0)
local update_changed = function (fname, contents)
local F = io.open(fname, 'r')
if F ~= nil then
if F:read('*a') == contents then
return
end
io.close(F)
end
io.close(F)
F = io.open(fname, 'w')
F:write(contents)
F:close()
end
F = io.open(non_static_fname, 'w')
F:write(non_static)
F:close()
update_changed(static_fname, static)
update_changed(non_static_fname, non_static)