rpmbuild: warn if header color differs from color of the package architecture.

- For example, warn when building an x86_64 package that only contains 32
  bit binaries.
- This should indicate to the maintainers that they might have gotten the
  architecture wrong.
- Introduces 'archcolor' in rpmrc so we can map architectures to colors.
- Related: RhBug:713323

build/files.c

@@ -2109,6 +2109,8 @@ rpmRC processBinaryFiles(rpmSpec spec, rpmBuildPkgFlags pkgFlags,
     for (pkg = spec->packages; pkg != NULL; pkg = pkg->next) {
 	char *nvr;
 	const char *a;
+	int header_color;
+	int arch_color;
 
 	if (pkg->fileList == NULL)
 	    continue;
@@ -2124,7 +2126,15 @@ rpmRC processBinaryFiles(rpmSpec spec, rpmBuildPkgFlags pkgFlags,
 	    goto exit;
 
 	a = headerGetString(pkg->header, RPMTAG_ARCH);
-	if (rstreq(a, "noarch") && headerGetNumber(pkg->header, RPMTAG_HEADERCOLOR) != 0) {
+	header_color = headerGetNumber(pkg->header, RPMTAG_HEADERCOLOR);
+	if (!rstreq(a, "noarch")) {
+	    arch_color = rpmGetArchColor(a);
+	    if (arch_color > 0 && !(arch_color & header_color)) {
+		rpmlog(RPMLOG_WARNING,
+		       _("Binaries arch (%d) not matching the package arch (%d).\n"),
+		       header_color, arch_color);
+	    }
+	} else if (header_color != 0) {
 	    int terminate = rpmExpandNumeric("%{?_binaries_in_noarch_packages_terminate_build}");
 	    rpmlog(terminate ? RPMLOG_ERR : RPMLOG_WARNING, 
 		   _("Arch dependent binaries in noarch package\n"));

lib/rpmlib.h

@@ -68,6 +68,13 @@ int rpmReadConfigFiles(const char * file,
 void rpmGetArchInfo( const char ** name,
 		int * num);
 
+/** \ingroup rpmrc
+ * Return color for an arch
+ * @param arch		name of an architecture
+ * @return color        color of arch, -1 if the arch couldn't be determined
+ */
+int rpmGetArchColor(const char *arch);
+
 /** \ingroup rpmrc
  * Return current os name and/or number.
  * @todo Generalize to extract os component from target_platform macro.

lib/rpmrc.c

@@ -110,6 +110,7 @@ static struct tableType_s tables[RPM_MACHTABLE_COUNT] = {
 /* XXX get rid of this stuff... */
 /* Stuff for maintaining "variables" like SOURCEDIR, BUILDDIR, etc */
 #define RPMVAR_OPTFLAGS                 3
+#define RPMVAR_ARCHCOLOR                42
 #define RPMVAR_INCLUDE                  43
 #define RPMVAR_MACROFILES               49
 
@@ -119,6 +120,7 @@ static struct tableType_s tables[RPM_MACHTABLE_COUNT] = {
 /* The order of the flags is archSpecific, macroize, localize */
 
 static const struct rpmOption optionTable[] = {
+    { "archcolor",		RPMVAR_ARCHCOLOR,               1, 0, 0 },
     { "include",		RPMVAR_INCLUDE,			0, 0, 2 },
     { "macrofiles",		RPMVAR_MACROFILES,		0, 0, 1 },
     { "optflags",		RPMVAR_OPTFLAGS,		1, 1, 0 },
@@ -1287,6 +1289,28 @@ void rpmGetArchInfo(const char ** name, int * num)
     getMachineInfo(ARCH, name, num);
 }
 
+int rpmGetArchColor(const char *arch)
+{
+    const char *color;
+    char *e;
+    int color_i;
+
+    arch = lookupInDefaultTable(arch,
+				tables[currTables[ARCH]].defaults,
+				tables[currTables[ARCH]].defaultsLength);
+    color = rpmGetVarArch(RPMVAR_ARCHCOLOR, arch);
+    if (color == NULL) {
+	return -1;
+    }
+
+    color_i = strtol(color, &e, 10);
+    if (!(e && *e == '\0')) {
+	return -1;
+    }
+
+    return color_i;
+}
+
 void rpmGetOsInfo(const char ** name, int * num)
 {
     getMachineInfo(OS, name, num);

rpmrc.in

@@ -82,6 +82,39 @@ optflags: sh3 -O2 -g
 optflags: sh4 -O2 -g -mieee
 optflags: sh4a -O2 -g -mieee
 
+#############################################################
+# Architecture colors
+
+archcolor: noarch 0
+archcolor: i386 1
+archcolor: alpha 2
+archcolor: sparc 1
+archcolor: sparc64 2
+archcolor: sparcv9 2
+archcolor: ppc 1
+archcolor: ppc64 2
+
+archcolor: armv3l 1
+archcolor: armv4b 1
+archcolor: armv4l 1
+archcolor: armv4tl 1
+archcolor: armv5tel 1
+archcolor: armv5tejl 1
+archcolor: armv6l 1
+archcolor: armv7l 1
+
+archcolor: m68kmint 1
+
+archcolor: s390 1
+archcolor: s390x 2
+
+archcolor: ia64 2
+
+archcolor: x86_64 2
+
+archcolor: sh3 1
+archcolor: sh4 1
+
 #############################################################
 # Canonical arch names and numbers