Inherit additional build flags from redhat-rpm-config (#1947895)

This adds additional coverage for aarch64, ppc64le, x86_64.  At
present, these changes have no effect: On x86_64, we used
-march=x86-64-v2 as the built-in GCC default before, and on
aarch64 and on ppc64le, redhat-rpm-config does not list any of the
flags added here.

Resolves: #1947895

glibc.spec

@@ -89,7 +89,7 @@
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 6%{?dist}
+Release: 7%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -1087,18 +1087,29 @@ rpm_inherit_flags \
 	"-m31" \
 	"-m32" \
 	"-m64" \
+	"-march=armv8-a+lse" \
+	"-march=armv8.1-a" \
 	"-march=haswell" \
 	"-march=i686" \
 	"-march=x86-64" \
+	"-march=x86-64-v2" \
+	"-march=x86-64-v3" \
+	"-march=x86-64-v4" \
 	"-march=z13" \
 	"-march=z14" \
 	"-march=z15" \
 	"-march=zEC12" \
 	"-mbranch-protection=standard" \
+	"-mcpu=power10" \
+	"-mcpu=power8" \
+	"-mcpu=power9" \
 	"-mfpmath=sse" \
 	"-msse2" \
 	"-mstackrealign" \
 	"-mtune=generic" \
+	"-mtune=power10" \
+	"-mtune=power8" \
+	"-mtune=power9" \
 	"-mtune=z13" \
 	"-mtune=z14" \
 	"-mtune=z15" \
@@ -2277,6 +2288,9 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Fri Apr  9 2021 Florian Weimer <fweimer@redhat.com> - 2.33-7
+- Inherit additional build flags from redhat-rpm-config (#1947895)
+
 * Wed Apr  7 2021 Florian Weimer <fweimer@redhat.com> - 2.33-6
 - Remove power9 multilib (#1889978)