Rebase to 3.75| Use devtoolset-9 on EPEL7

pstoedit.spec

@@ -1,3 +1,7 @@
+%if 0%{?el7}
+%global dts devtoolset-9-
+%endif
+
 Name:           pstoedit
 Version:        3.75
 Release:        1%{?dist}
@@ -13,7 +17,7 @@ BuildRequires:  gd-devel
 BuildRequires:  dos2unix
 BuildRequires:  ghostscript
 BuildRequires:  plotutils-devel
-BuildRequires:  gcc-c++, gcc
+BuildRequires:  %{?dts}gcc-c++, %{?dts}gcc
 BuildRequires:  libzip-devel
 BuildRequires:  ImageMagick-c++-devel
 %if 0%{?fedora} || 0%{?rhel} > 7
@@ -46,6 +50,10 @@ applications
 dos2unix doc/*.htm doc/readme.txt
 
 %build
+%if 0%{?el7}
+%{?dts:source /opt/rh/devtoolset-9/enable}
+%endif
+
 %configure --disable-static --enable-docs=no --with-libzip-include=%{_includedir} \
 %if 0%{?rhel} == 7
  --without-emf