new linux mozconfigs

mozconfigs/linux/uxp-linux-x64-clang

@@ -0,0 +1,67 @@
+# Set GTK Version to 2 or 3
+_GTK_VERSION=3
+
+# 16 jobs for 16 cores
+mk_add_options MOZ_MAKE_FLAGS="-j6"
+
+# Use clang/llvm toolchain
+export CC="/usr/bin/clang"
+export CXX="/usr/bin/clang++"
+export AR="/usr/bin/llvm-ar"
+export NM="/usr/bin/llvm-nm"
+export RANLIB="/usr/bin/llvm-ranlib"
+export LD=ld.lld
+
+# Force LLVM for HOST tools as well
+export HOST_CC=/usr/bin/clang
+export HOST_CXX=/usr/bin/clang++
+export HOST_AR=/usr/bin/llvm-ar
+export HOST_RANLIB=/usr/bin/llvm-ranlib
+export HOST_NM=/usr/bin/llvm-nm
+export HOST_LD=ld.lld
+
+# Ensure static archives always get a symbol table (__.SYMDEF).
+# Older Mozilla/UXP build logic assumes ar creates this implicitly,
+# but with ThinLTO + LLVM bitcode that is no longer guaranteed.
+# Without the 's' flag, ld/lld will fail with:
+#   "archive has no index; run ranlib to add one"
+# This is especially critical for HOST tools (mbsdiff, mar, etc.).
+export ARFLAGS=crs
+export HOST_ARFLAGS=crs
+export ARFLAGS=crs
+export HOST_ARFLAGS=crs
+
+# ThinLTO with Clang/LLVM. -Wl,--undefined-version is needed due to differences between GNU ld and lld
+export LDFLAGS="-flto=thin -fuse-ld=lld -Wl,--undefined-version"
+
+# O3 for maximum optimization, -w to suppress all warnings, -flto=thin for ThinLTO
+ac_add_options --enable-optimize="-O3 -w -flto=thin"
+
+# Standard build options for Basilisk
+ac_add_options --enable-application=basilisk
+ac_add_options --enable-default-toolkit=cairo-gtk$_GTK_VERSION
+ac_add_options --enable-jemalloc
+ac_add_options --enable-strip
+ac_add_options --enable-devtools
+ac_add_options --enable-av1
+ac_add_options --enable-webrtc
+ac_add_options --enable-gamepad
+ac_add_options --enable-pie
+ac_add_options --enable-update-channel=release
+ac_add_options --disable-tests
+ac_add_options --disable-debug
+ac_add_options --disable-necko-wifi
+ac_add_options --disable-updater
+ac_add_options --with-pthreads
+ac_add_options --disable-official-branding
+
+export MOZILLA_OFFICIAL=1
+
+ac_add_options --x-libraries=/usr/lib64
+
+export MOZ_PKG_SPECIAL=gtk$_GTK_VERSION
+
+export CC="clang -std=gnu89 -Wno-error=implicit-int -Wno-error=implicit-function-declaration"
+export CXX="clang++ -std=gnu++17"
+
+export MOZ_SOURCE_CHANGESET=iloveneedingtobodgechangesetfornoreason