Correctly stop overriding optimization flags

gn-0153d369-no-O3.patch

@@ -0,0 +1,14 @@
+diff -Naur gn-0153d369bbccc908f4da4993b1ba82728055926a-original/build/gen.py gn-0153d369bbccc908f4da4993b1ba82728055926a/build/gen.py
+--- gn-0153d369bbccc908f4da4993b1ba82728055926a-original/build/gen.py	2021-09-27 14:58:14.000000000 -0400
++++ gn-0153d369bbccc908f4da4993b1ba82728055926a/build/gen.py	2021-09-27 15:59:42.330405195 -0400
+@@ -344,10 +344,8 @@
+       cflags.extend(['-O0', '-g'])
+     else:
+       cflags.append('-DNDEBUG')
+-      cflags.append('-O3')
+       if options.no_strip:
+         cflags.append('-g')
+-      ldflags.append('-O3')
+       # Use -fdata-sections and -ffunction-sections to place each function
+       # or data item into its own section so --gc-sections can eliminate any
+       # unused functions and data items.

gn.spec

@@ -45,6 +45,8 @@ Source2:        update-version
 
 # Clean up compiler warnings on gcc/g++:
 Patch0:         https://src.fedoraproject.org/rpms/chromium/raw/ce30313f5e4af121140c037bf026453355534f24/f/chromium-84.0.4147.105-gn-gcc-cleanup.patch
+# Stop overriding optimization flags
+Patch1:         %{name}-0153d369-no-O3.patch
 
 # The python3_pkgversion macro is required for EPEL; see
 # https://fedoraproject.org/wiki/PackagingDrafts:Python3EPEL. On Fedora (and
@@ -84,7 +86,9 @@ The %{name}-doc package contains detailed documentation for GN.
 
 
 %prep
-%autosetup -c -n %{name}-%{commit} -p3
+%setup -c -n %{name}-%{commit} -q
+%patch0 -p3
+%patch1 -p1
 
 # Use pre-generated last_commit_position.h.
 mkdir -p ./out
@@ -96,8 +100,6 @@ cp -vp misc/vim/README.md README-vim.md
 
 # Fix shebangs in examples and such.
 %py3_shebang_fix .
-# On EPEL7, we would have to work around the missing py3_shebang_fix macro, but
-# the package would not build anyway because it requires C++17 support.
 
 
 %build