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43 lines
1.1 KiB
43 lines
1.1 KiB
3 months ago
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# Macros to constrain resource use during the build process
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# outputs build flag overrides to be used in conjunction with
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# %%make_build, %%cmake_build etc.
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#
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# if no override is needed, this macro outputs nothing
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#
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# - m memory limit in MBs per core; default is 1024
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#
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# Usage:
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# e.g. %make_build %{limit_build -m 2048}
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# => /usr/bin/make -O -j16 V=1 VERBOSE=1
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# %make_build %{limit_build -m 40960}
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# => /usr/bin/make -O -j16 V=1 VERBOSE=1 -j1
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#
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%limit_build(m:) %{lua:
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local mem_per_process=rpm.expand("%{-m*}")
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if mem_per_process == "" then
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mem_per_process = 1024
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else
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mem_per_process = tonumber(mem_per_process)
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end
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local mem_total = 0
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for line in io.lines('/proc/meminfo') do
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if line:sub(1, 9) == "MemTotal:" then
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local tokens = {}
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for token in line:gmatch("%w+") do
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tokens[#tokens + 1] = token
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end
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mem_total = tonumber(tokens[2])
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break
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end
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end
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local max_jobs = mem_total // (mem_per_process * 1024)
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if max_jobs < 1 then
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max_jobs = 1
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end
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cur_max_jobs=tonumber(rpm.expand("%{_smp_build_ncpus}"))
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if cur_max_jobs > max_jobs then
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print("-j" .. max_jobs)
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end
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}
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