Fix invoking autogen/configure so the default CFLAGS actually get applied

Resolves: rhbz#2044881

motif.spec

@@ -1,7 +1,7 @@
 Summary: Run-time libraries and programs
 Name: motif
 Version: 2.3.4
-Release: 24%{?dist}
+Release: 25%{?dist}
 License: LGPLv2+
 Source: http://downloads.sf.net/motif/motif-%{version}-src.tgz
 Source1: xmbind
@@ -72,9 +72,8 @@ This package contains the static Motif libraries.
 %patch48 -p1 -b .format-security
 
 %build
-CFLAGS="$RPM_OPT_FLAGS -D_FILE_OFFSET_BITS=64" \
-./autogen.sh --libdir=%{_libdir} --enable-static --enable-xft --enable-jpeg \
-   --enable-png
+./autogen.sh
+%configure --enable-static --enable-xft --enable-jpeg --enable-png
 
 make clean %{?_smp_mflags}
 make -C include
@@ -120,6 +119,10 @@ rm -f %{buildroot}%{_libdir}/*.la
 %{_libdir}/lib*.a
 
 %changelog
+* Thu Feb 03 2022 Adam Jackson <ajax@redhat.com> - 2.3.4-25
+- Fix invoking autogen/configure so the default CFLAGS actually get applied
+  Resolves: rhbz#2044881
+
 * Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 2.3.4-24
 - Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
   Related: rhbz#1991688