New script gcc-toolset-15-env

Add a new script to replace the `scl enable` command.  Also update the
`enable_devtoolset` macro to instead be called `enable_gcctoolset` and
have it use a new installed script instead of an SCL snippet.

Resolves: RHEL-88743

enable.in

@@ -0,0 +1,23 @@
+# General environment variables
+export PATH=%{_bindir}${PATH:+:${PATH}}
+export MANPATH=%{_mandir}${MANPATH:+:${MANPATH}}
+export INFOPATH=%{_infodir}${INFOPATH:+:${INFOPATH}}
+# ??? We probably don't need this anymore.
+export PCP_DIR=%{_scl_root}
+# bz847911 workaround:
+# we need to evaluate rpm's installed run-time % { _libdir }, not rpmbuild time
+# or else /etc/ld.so.conf.d files?
+rpmlibdir=$(rpm --eval "%%{_libdir}")
+# bz1017604: On 64-bit hosts, we should include also the 32-bit library path.
+# bz1873882: On 32-bit hosts, we should include also the 64-bit library path.
+# bz2027377: Avoid unbound variables
+if [ "$rpmlibdir" != "${rpmlibdir/lib64/}" ]; then
+  rpmlibdir32=":%{_scl_root}${rpmlibdir/lib64/lib}"
+  rpmlibdir64=
+else
+  rpmlibdir64=":%{_scl_root}${rpmlibdir/lib/lib64}"
+  rpmlibdir32=
+fi
+# Prepend the usual /opt/.../usr/lib{64,}.
+export LD_LIBRARY_PATH=%{_scl_root}$rpmlibdir$rpmlibdir64$rpmlibdir32${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}
+export PKG_CONFIG_PATH=%{_libdir}/pkgconfig${PKG_CONFIG_PATH:+:${PKG_CONFIG_PATH}}

gcc-toolset-15.spec

@@ -33,13 +33,15 @@ BuildRequires: scl-utils-build
 Summary: Package that installs %scl
 Name: %scl_name
 Version: %{gts_ver}.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2+
 Group: Applications/File
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Source0: README
 Source2: gts-annobin-plugin-select.sh
 Source3: macros.gts
+Source4: enable.in
+Source5: gcc-toolset-env.in
 
 %if %have_scl_utils
 Requires: %{scl_prefix}runtime
@@ -125,32 +127,16 @@ help2man -N --section 7 ./h2m_helper -o %{?scl_name}.7
 
 # Enable collection script
 # ========================
-cat <<EOF >enable
+cat <<'EOF' | tee enable
-# General environment variables
+%{expand:%(cat %{SOURCE4})}
-export PATH=%{_bindir}\${PATH:+:\${PATH}}
-export MANPATH=%{_mandir}\${MANPATH:+:\${MANPATH}}
-export INFOPATH=%{_infodir}\${INFOPATH:+:\${INFOPATH}}
-# ??? We probably don't need this anymore.
-export PCP_DIR=%{_scl_root}
-# bz847911 workaround:
-# we need to evaluate rpm's installed run-time % { _libdir }, not rpmbuild time
-# or else /etc/ld.so.conf.d files?
-rpmlibdir=\$(rpm --eval "%%{_libdir}")
-# bz1017604: On 64-bit hosts, we should include also the 32-bit library path.
-# bz1873882: On 32-bit hosts, we should include also the 64-bit library path.
-# bz2027377: Avoid unbound variables
-if [ "\$rpmlibdir" != "\${rpmlibdir/lib64/}" ]; then
-  rpmlibdir32=":%{_scl_root}\${rpmlibdir/lib64/lib}"
-  rpmlibdir64=
-else
-  rpmlibdir64=":%{_scl_root}\${rpmlibdir/lib/lib64}"
-  rpmlibdir32=
-fi
-# Prepend the usual /opt/.../usr/lib{64,}.
-export LD_LIBRARY_PATH=%{_scl_root}\$rpmlibdir\$rpmlibdir64\$rpmlibdir32\${LD_LIBRARY_PATH:+:\${LD_LIBRARY_PATH}}
-export PKG_CONFIG_PATH=%{_libdir}/pkgconfig\${PKG_CONFIG_PATH:+:\${PKG_CONFIG_PATH}}
 EOF
 
+%if %have_scl_utils == 0
+cat <<'EOF' | tee gcc-toolset-%{gts_ver}-env
+%{expand:%(cat %{SOURCE5})}
+EOF
+%endif
+
 %install
 
 %if %have_scl_utils
@@ -168,9 +154,15 @@ mkdir -p %{buildroot}%{_root_sysconfdir}/rpm
 sed 's/^%%define scl_/%%scl_/' %{SOURCE3} > %{buildroot}%{_root_sysconfdir}/rpm/macros.%{scl}-build
 %endif
 
+%if %have_scl_utils
+%define source_cmd source scl_source enable %{scl}
+%else
+%define source_cmd source %{_root_prefix}/lib/gcc-toolset/%{gts_ver}-env.source
+%endif
+
 # This allows users to build packages using DTS/GTS.
 cat >> %{buildroot}%{_root_sysconfdir}/rpm/macros.%{scl}-enable << EOF
-%%enable_devtoolset%{gts_ver} %%global ___build_pre %%{___build_pre}; source scl_source enable %{scl} || :
+%%enable_gcctoolset%{gts_ver} %%global ___build_pre %%{___build_pre}; %source_cmd || :
 EOF
 
 %if %have_scl_utils
@@ -193,6 +185,11 @@ install -d -m 755 %{buildroot}%{_libdir}/perl5/vendor_perl/auto
 mkdir -p %{buildroot}%{rrcdir}
 install -p -m 755 %{SOURCE2} %{buildroot}%{rrcdir}/
 %endif
+%else
+install -d -m 755 %{buildroot}%{_root_bindir}
+install -p -m 755 gcc-toolset-%{gts_ver}-env %{buildroot}%{_root_bindir}/
+install -d -m 755 %{buildroot}%{_root_prefix}/lib/gcc-toolset
+install -p -m 755 enable %{buildroot}%{_root_prefix}/lib/gcc-toolset/%{gts_ver}-env.source
 %endif
 
 # Install generated man page.
@@ -221,6 +218,8 @@ install -p -m 644 %{?scl_name}.7 %{buildroot}%{_mandir}/man7/
 %{_mandir}/man7/%{?scl_name}.*
 %if %have_scl_utils == 0
 %{_root_sysconfdir}/rpm/macros.%{scl}-enable
+%{_root_bindir}/gcc-toolset-%{gts_ver}-env
+%{_root_prefix}/lib/gcc-toolset/%{gts_ver}-env.source
 %endif
 
 %if %have_scl_utils
@@ -255,6 +254,9 @@ fi
 %endif
 
 %changelog
+* Thu May 15 2025 Siddhesh Poyarekar <siddhesh@redhat.com> - 15.0-4
+- New script to replace scl-enable (RHEL-88743).
+
 * Thu May  8 2025 Siddhesh Poyarekar <siddhesh@redhat.com> - 15.0-3
 - Drop the sudo wrapper script.
 

gcc-toolset-env.in

@@ -0,0 +1,11 @@
+# Environment wrapper for GCC Toolset %{gts_ver}
+
+source %{_root_prefix}/lib/gcc-toolset/%{gts_ver}-env.source
+
+if [ -z $1 ]; then
+  cmd="/bin/sh"
+else
+  cmd=$*
+fi
+
+exec $cmd