- Timestamp:
- 02/28/2023 03:48:28 AM (20 months ago)
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- xry111/arm64, xry111/arm64-12.0
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chapter04/aboutsbus.xml
r0cbb853 r83ce6e3 14 14 it takes to compile and install each package. Because Linux From 15 15 Scratch can be built on many different systems, it is impossible to 16 provide absolute time estimates. The biggest package ( Glibc) will17 take approximately 20minutes on the fastest systems, but could take18 up to threedays on slower systems! Instead of providing actual times,16 provide absolute time estimates. The biggest package (gcc) will 17 take approximately 5 minutes on the fastest systems, but could take 18 days on slower systems! Instead of providing actual times, 19 19 the Standard Build Unit (SBU) measure will be 20 20 used instead.</para> 21 21 22 <para>The SBU measure works as follows. The first package to be compiled 23 is binutils in <xref linkend="chapter-cross-tools"/>. The24 time it takes to compile this package is what we will refer to as the25 Standard Build Unit or SBU. All other compile times will be expressed in26 terms of thisunit of time.</para>22 <para>The SBU measure works as follows. The first package to be compiled is 23 binutils in <xref linkend="chapter-cross-tools"/>. The time it takes to 24 compile using one core is what we will refer to as the Standard 25 Build Unit or SBU. All other compile times will be expressed in terms of this 26 unit of time.</para> 27 27 28 28 <para>For example, consider a package whose compilation time is 4.5 … … 56 56 interleaved. If you run into a problem with a build step, revert to a 57 57 single processor build to properly analyze the error messages.</para> 58 59 <para>The times presented here are based upon using four cores (-j4). The 60 times in Chapter 8 also include the time to run the regression tests for 61 the package unless specified otherwise.</para> 62 58 63 </note> 59 64
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