!3 rebuild and sovle compile error

From: @tanyulong2021 
Reviewed-by: @tangjie02 
Signed-off-by: @tangjie02

gcolor2-0.4-gcc10.patch

@@ -0,0 +1,29 @@
+diff -ru gcolor2-0.4.orig/src/callbacks.c gcolor2-0.4/src/callbacks.c
+--- gcolor2-0.4.orig/src/callbacks.c	2005-07-12 14:06:12.000000000 -0400
++++ gcolor2-0.4/src/callbacks.c	2020-04-27 10:06:57.988405153 -0400
+@@ -12,6 +12,9 @@
+ #include <string.h>
+ #include <glib/gprintf.h>
+ 
++GtkWidget        *gcolor2;
++GtkWidget        *menu;
++GdkColor          colorvalue;
+ GtkWidget        *savedialog;
+ gchar            *colorname;
+ static GtkWidget *aboutdialog = NULL;
+diff -ru gcolor2-0.4.orig/src/callbacks.h gcolor2-0.4/src/callbacks.h
+--- gcolor2-0.4.orig/src/callbacks.h	2005-07-11 19:18:59.000000000 -0400
++++ gcolor2-0.4/src/callbacks.h	2020-04-27 10:05:55.157028236 -0400
+@@ -41,9 +41,9 @@
+                            "\302\267 Usability / user interface enhancements\n" \
+                            "\302\267 Code cleanup"
+ 
+-GtkWidget *gcolor2;
+-GtkWidget *menu;
+-GdkColor   colorvalue;
++extern GtkWidget *gcolor2;
++extern GtkWidget *menu;
++extern GdkColor   colorvalue;
+ 
+ enum
+ {

gcolor2.spec

@@ -1,6 +1,6 @@
 Name:           gcolor2
 Version:        0.4
-Release:        17%{?dist}
+Release:        18
 Summary:        A simple color selector for GTK+2
 
 License:        GPLv2
@@ -13,33 +13,34 @@ Patch0:         %{name}-0.4-missing-includes.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=716100
 # bugs.debian.org/cgi-bin/bugreport.cgi?bug=634606
 Patch1:         %{name}-0.4-ftbfs.patch
+# fix for default -fno-common in GCC10
+Patch2:         %{name}-0.4-gcc10.patch
 
+BuildRequires:  desktop-file-utils
 BuildRequires:  gcc
-BuildRequires:  gtk2-devel perl(XML::Parser) desktop-file-utils
+BuildRequires:  gtk2-devel
+BuildRequires:  make
+BuildRequires:  perl-interpreter
+BuildRequires:  perl(XML::Parser)
 
 %description
 gcolor2 is a simple color selector that was originally based on gcolor, 
 ported to use GTK+2, and now has a completely new UI. 
 
 %prep
-%setup -q
-%patch0 -p1 -b .missing
-%patch1 -p1 -b .ftbfs
+%autosetup -p1
 # make sure path to icon is correct
 sed -i 's!/usr/share!%{_datadir}!' %{SOURCE1}
 
 
 %build
 %configure
-make %{?_smp_mflags}
+%make_build
 
 
 %install
-rm -rf %{buildroot}
-make install DESTDIR=%{buildroot} INSTALL="install -p"
-desktop-file-install                                    \
-  --dir=%{buildroot}%{_datadir}/applications       \
-  %{SOURCE1}
+%make_install
+desktop-file-install --dir=%{buildroot}%{_datadir}/applications %{SOURCE1}
 
 
 
@@ -50,6 +51,8 @@ desktop-file-install                                    \
 %{_datadir}/applications/%{name}.desktop
 
 %changelog
+* Mon Jun 13 2022 tanyulong <tanyulong@kylinos.cn> - 0.4-18
+- rebuild and solve compile error
+
 * Thu Jan 31 2019 iSoft <isoft@isoft-linux.com> - 0.4-17
 - Rebuilt by iSoft for iSoft
-