Changeset ab7af9e

Timestamp:

03/26/2022 03:25:36 PM (2 years ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, bdubbs/gcc13, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

355d761, d608267, f23beb1

Parents:

827cc05

git-author:

Xi Ruoyao <xry111@…> (03/26/2022 03:21:06 PM)

git-committer:

Xi Ruoyao <xry111@…> (03/26/2022 03:25:36 PM)

Message:

libffi: reword the note about "building for another system"

Telling the user to override CFLAGS and CXXFLAGS may cause two problems:

1. We've added --with-gcc-arch=native, so the configure script will add "-march=native" into CFLAGS. Then we've not really verified which -march= value is the last one in the GCC command line and being really used.
2. User may just export CFLAGS="-march=x86_64", without "-O2". This will produce unoptimized binaries.

File:

• chapter08/libffi.xml (modified) (1 diff)

chapter08/libffi.xml

@@ -45 +45 @@
     <note>
       <para>Similar to GMP, libffi builds with optimizations specific
-      to the processor in use. If building for another system, export
-      CFLAGS and CXXFLAGS to specify a generic build for your architecture.
+      to the processor in use. If building for another system, change the
+      value of the <parameter>--with-gcc-arch=</parameter> parameter in the
+      following command to an architecture name fully implemented by the
+      CPU on that system.
       If this is not done, all applications that link to libffi will trigger
       Illegal Operation Errors.</para>