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-rw-r--r--util/crossgcc/patches/gmp-6.2.0_generic-build.patch20
1 files changed, 20 insertions, 0 deletions
diff --git a/util/crossgcc/patches/gmp-6.2.0_generic-build.patch b/util/crossgcc/patches/gmp-6.2.0_generic-build.patch
new file mode 100644
index 0000000000..a05635f1d1
--- /dev/null
+++ b/util/crossgcc/patches/gmp-6.2.0_generic-build.patch
@@ -0,0 +1,20 @@
+Ensure that GMP is built for a generic CPU on x86
+
+While GMP supports fat builds on x86 that adapt to the CPU's
+capabilities, by default it builds for the CPU of the builder.
+Running that binary on an older CPU then can fail.
+--- gmp-6.2.0/config.guess~ 2020-09-02 19:23:01.817510842 +0200
++++ gmp-6.2.0/config.guess 2020-09-02 19:24:55.742325907 +0200
+@@ -1029,6 +1029,12 @@
+ virtualisers allow guests to set a broken state. */
+ suffix = "noavx";
+
++ if (cpuid_64bit) {
++ modelstr="x86_64";
++ } else {
++ modelstr="pentium";
++ }
++ suffix="";
+ printf ("%s%s", modelstr, suffix);
+ return 0;
+ }