Copied from Debian.

From: Rodeo
Origin: https://github.com/HandBrake/HandBrake/blob/master/contrib/a52dec/A04-modern-gcc-cflags.patch

--- a52dec-0.7.4/configure.in.orig
+++ a52dec-0.7.4/configure.in
@@ -34,11 +34,11 @@
     case "$host" in
     i?86-* | k?-*)
 	case "$host" in
-	i386-*) OPT_CFLAGS="$CFLAGS -mcpu=i386";;
-	i486-*) OPT_CFLAGS="$CFLAGS -mcpu=i486";;
-	i586-*) OPT_CFLAGS="$CFLAGS -mcpu=pentium";;
-	i686-*) OPT_CFLAGS="$CFLAGS -mcpu=pentiumpro";;
-	k6-*)   OPT_CFLAGS="$CFLAGS -mcpu=k6";;
+	i386-*) OPT_CFLAGS="$CFLAGS -mtune=i386";;
+	i486-*) OPT_CFLAGS="$CFLAGS -mtune=i486";;
+	i586-*) OPT_CFLAGS="$CFLAGS -mtune=pentium";;
+	i686-*) OPT_CFLAGS="$CFLAGS -mtune=pentiumpro";;
+	k6-*)   OPT_CFLAGS="$CFLAGS -mtune=k6";;
 	esac
 	AC_TRY_CFLAGS([$OPT_CFLAGS],[CFLAGS=$OPT_CFLAGS]);;
     sparc-* | sparc64-*)
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<tr><td><span title='2018-02-26 20:58:14 +0100'>2018-02-26</span></td><td><a href='/guix/commit/gnu/packages/ninja.scm?id=6d796220c417a34100c282a7fa1f9afb6ac00339'>gnu: ninja: Patch /bin/echo in the correct file.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-02-26 20:37:04 +0100'>2018-02-26</span></td><td><a href='/guix/commit/gnu/packages/ninja.scm?id=d0de4c40e24ee52e4382ee2ac82088932ab49099'>gnu: ninja: Patch hard-coded /bin/echo reference.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-01-19 13:19:33 +0100'>2018-01-19</span></td><td><a href='/guix/commit/gnu/packages/ninja.scm?id=5bb12e1462c4ecfbed829b09ed011853dd74209d'>gnu: ninja: Update to 1.8.2.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-03-17 20:41:15 +0100'>2017-03-17</span></td><td><a href='/guix/commit/gnu/packages/ninja.scm?id=cbef2796edcd35d63fd5a1eea9390fc98564c7f2'>gnu: ninja: Update to 1.7.2.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>