`pkg-config` files (`.pc`) conflict between default and free-threaded build

[colesbury]

Bug report

If you install the default and free-threaded build to the same prefix, some files conflict and will get overwritten by the most recent install:

	modified:   bin/idle3.13
	modified:   bin/pydoc3.13
	modified:   bin/python3.13
	typechange: bin/python3.13-config
	modified:   lib/pkgconfig/python-3.13-embed.pc
	modified:   lib/pkgconfig/python-3.13.pc

The most problematic of these are the pkg-config files:

diff --git a/lib/pkgconfig/python-3.13-embed.pc b/lib/pkgconfig/python-3.13-embed.pc
index 9bc6ab5..5fc2548 100644
--- a/lib/pkgconfig/python-3.13-embed.pc
+++ b/lib/pkgconfig/python-3.13-embed.pc
@@ -9,5 +9,5 @@ Description: Embed Python into an application
 Requires:
 Version: 3.13
 Libs.private: -ldl  -framework CoreFoundation
-Libs: -L${libdir} -lpython3.13
-Cflags: -I${includedir}/python3.13
+Libs: -L${libdir} -lpython3.13t
+Cflags: -I${includedir}/python3.13t
diff --git a/lib/pkgconfig/python-3.13.pc b/lib/pkgconfig/python-3.13.pc
index c206220..519f20f 100644
--- a/lib/pkgconfig/python-3.13.pc
+++ b/lib/pkgconfig/python-3.13.pc
@@ -10,4 +10,4 @@ Requires:
 Version: 3.13
 Libs.private: -ldl  -framework CoreFoundation
 Libs: -L${libdir}
-Cflags: -I${includedir}/python3.13
+Cflags: -I${includedir}/python3.13t

Maybe the pkg-config files for the free-threaded build should be called python-3.13t.pc and python-3.13t-embed.pc?

Linked PRs

• gh-119729: Use 't' in pkg-config file name for free-threaded build #119738
• [3.13] gh-119729: Use 't' in pkg-config file name for free-threaded build (GH-119738) #119797

[erlend-aasland]

Maybe the pkg-config files for the free-threaded build should be called python-3.13t.pc and python-3.13t-embed.pc?

Gut reaction: yes