gnu: mozjs: Apply patch to resolve an error in the gjs build.

The headers of mozjs would previous return "#error "Unsupported OS?" when
building a recent gjs.

* gnu/packages/patches/mozjs-bug-1973994-fix-c-header.patch: New patch.
* gnu/packages/gnuzilla.scm (mozjs): Apply it.
* gnu/local.mk (dist_patch_DATA): Register it.

Change-Id: I9b3fb0d13a41524e6047940bc0759a218c69b277
Signed-off-by: Noé Lopez <noelopez@free.fr>

3 files changed, 30 insertions, 1 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index c2552790fbd..175318f045e 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1936,6 +1936,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/mle-1.8.1-no-var-lookbehind.patch        \
   %D%/packages/patches/mono-msbuild-15.7.179-fix-build.patch    \
   %D%/packages/patches/mono-msbuild-15.7.179-fix-resources.patch        \
+  %D%/packages/patches/mozjs-bug-1973994-fix-c-header.patch     \
   %D%/packages/patches/libmemcached-build-with-gcc7.patch       \
   %D%/packages/patches/libmhash-hmac-fix-uaf.patch              \
   %D%/packages/patches/libmodbus-disable-networking-test.patch \
diff --git a/gnu/packages/gnuzilla.scm b/gnu/packages/gnuzilla.scm
index 71e50212029..790f6490eb7 100644
--- a/gnu/packages/gnuzilla.scm
+++ b/gnu/packages/gnuzilla.scm
@@ -1842,7 +1842,8 @@ associated with their name."))
   (package
     (name "mozjs")
     (version %icecat-version)
-    (source icecat-source)
+    (source (origin (inherit icecat-source)
+                    (patches (search-patches "mozjs-bug-1973994-fix-c-header.patch"))))
     (build-system gnu-build-system)
     (arguments
      (list
diff --git a/gnu/packages/patches/mozjs-bug-1973994-fix-c-header.patch b/gnu/packages/patches/mozjs-bug-1973994-fix-c-header.patch
new file mode 100644
index 00000000000..422021c3fe2
--- /dev/null
+++ b/gnu/packages/patches/mozjs-bug-1973994-fix-c-header.patch
@@ -0,0 +1,27 @@
+Retrieved-from: <https://src.fedoraproject.org/rpms/mozjs140/raw/49492baa47bc1d7b7d5bc738c4c81b4661302f27/f/9aa8b4b051dd539e0fbd5e08040870b3c712a846.patch>
+Upstream-status: https://bugzilla.mozilla.org/show_bug.cgi?id=1973994
+
+From 9aa8b4b051dd539e0fbd5e08040870b3c712a846 Mon Sep 17 00:00:00 2001
+From: Philip Chimento <philip.chimento@gmail.com>
+Date: Wed, 16 Jul 2025 22:50:50 -0700
+Subject: [PATCH] Bug 1973994 - mozjs-140.pc does not contain -DXP_UNIX on
+ Linux
+
+Temporary fix.
+---
+ js/src/js-config.h.in | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/js/src/js-config.h.in b/js/src/js-config.h.in
+index 8372623586..498ea968ba 100644
+--- a/js/src/js-config.h.in
++++ b/js/src/js-config.h.in
+@@ -68,4 +68,8 @@
+ #undef MOZJS_MAJOR_VERSION
+ #undef MOZJS_MINOR_VERSION
+ 
++/* Controls API in UniquePtrExtensions.h. */
++#undef XP_UNIX
++#undef XP_WIN
++
+ #endif /* js_config_h */