add explicit gcc dependency

gpsd.spec

@@ -14,6 +14,7 @@ Source11:       gpsd.sysconfig
 # Add old status names to gps.h for compatibility
 Patch1:         gpsd-apistatus.patch
 
+BuildRequires:  gcc
 BuildRequires:  dbus-devel            
 BuildRequires:  dbus-glib-devel            
 BuildRequires:  ncurses-devel            
@@ -27,9 +28,9 @@ BuildRequires:  python3-pyserial
 BuildRequires:  desktop-file-utils
 BuildRequires:  bluez-libs-devel
 BuildRequires:  pps-tools-devel
-BuildRequires:  /usr/bin/c++
 BuildRequires:  systemd
 %if %{with_qt}
+BuildRequires:  gcc-c++
 BuildRequires:  qt-devel
 %endif
 BuildRequires:  libusb1-devel