Fix: BuildDir does not care about architecture, remove arch flag to create the same help on all platform

Signed-off-by: Jia Chao <jiac13@chinaunicom.cn>

openjpeg2.spec

@@ -1,6 +1,8 @@
+%global BuildDir %{_vendor}-%{_target_os}%{?_gnu}
+
 Name:           openjpeg2
 Version:        2.5.0
-Release:        2
+Release:        3
 Summary:        C-Library for JPEG 2000
 License:        BSD and MIT
 URL:            https://github.com/uclouvain/openjpeg
@@ -47,8 +49,8 @@ Command line tools for JPEG 2000 file manipulation, using OpenJPEG2:
 find thirdparty/ -mindepth 1 -maxdepth 1 -type d -exec rm -rf {} \;
 
 %build
-mkdir %{_target_platform}
-pushd %{_target_platform}
+mkdir %{BuildDir}
+pushd %{BuildDir}
 %cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DOPENJPEG_INSTALL_LIB_DIR=%{_lib} \
     %{?optional_components:-DBUILD_MJ2=ON -DBUILD_JPWL=ON -DBUILD_JPIP=ON -DBUILD_JP3D=ON} \
     -DBUILD_DOC=ON \
@@ -58,11 +60,11 @@ pushd %{_target_platform}
     ..
 popd
 
-%make_build VERBOSE=1 -C %{_target_platform}
+%make_build VERBOSE=1 -C %{BuildDir}
 
 
 %install
-%make_install -C %{_target_platform}
+%make_install -C %{BuildDir}
 
 mv %{buildroot}%{_mandir}/man1/opj_compress.1 %{buildroot}%{_mandir}/man1/opj2_compress.1
 mv %{buildroot}%{_mandir}/man1/opj_decompress.1 %{buildroot}%{_mandir}/man1/opj2_decompress.1
@@ -87,7 +89,7 @@ mv %{buildroot}%{_mandir}/man1/opj_dump.1 %{buildroot}%{_mandir}/man1/opj2_dump.
 
 %files help
 %defattr(-,root,root)
-%doc %{_target_platform}/doc/html
+%doc %{BuildDir}/doc/html
 %doc NEWS.md README.md THANKS.md
 %{_mandir}/man1/*.1*
 %{_mandir}/man3/*.3*
@@ -98,6 +100,9 @@ mv %{buildroot}%{_mandir}/man1/opj_dump.1 %{buildroot}%{_mandir}/man1/opj2_dump.
 %{_bindir}/opj2_dump
 
 %changelog
+* Mon May 29 2023 Jia Chao <jiachao2130@126.com> - 2.5.0-3
+- Fix: builddir contains arch info make help create different noarch pkg.
+
 * Tue Feb 28 2023 zhangpan <zhangpan103@h-partners.com> - 2.5.0-2
 - Remove useless buildrequires