diff --git a/extra/llvm/build b/extra/llvm/build
index d9d687c4..882ec66a 100755
--- a/extra/llvm/build
+++ b/extra/llvm/build
@@ -2,11 +2,6 @@
 
 mv Modules/* cmake/modules/
 
-# Remove ncurses dependency.
-sed 's/\(LLVM_ENABLE_TERMINFO\) 1/\1 2/' \
-    cmake/config-ix.cmake > _
-mv -f _ cmake/config-ix.cmake
-
 cmake -B build \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DCMAKE_BUILD_TYPE=Release \
@@ -25,3 +20,25 @@ cmake -B build \
 
 cmake --build   build
 cmake --install build
+
+# Use new llvm-config to generate a pkg-config file.
+PATH="$1/usr/bin:$PATH"
+mkdir -p "$1/usr/lib/pkgconfig"
+sed -e "s|$1||" -e 's|/usr/include|\${includedir}|' \
+    > "$1/usr/lib/pkgconfig/llvm.pc" <<EOF
+prefix=/usr
+exec_prefix=\${prefix}
+libdir=\${exec_prefix}/lib
+includedir=\${prefix}/include
+has_rtti=$(llvm-config --has-rtti)
+
+Name: LLVM
+Description: LLVM compiler infrastructure
+URL: https://llvm.org
+Version: $(llvm-config --version)
+Requires:
+Requires.private: zlib
+Libs: -L\${libdir} $(llvm-config --libs)
+Libs.private: -lstdc++ $(llvm-config --libs --link-static)
+Cflags: $(llvm-config --cflags)
+EOF
diff --git a/extra/llvm/checksums b/extra/llvm/checksums
index 13299bb1..f992f5af 100644
--- a/extra/llvm/checksums
+++ b/extra/llvm/checksums
@@ -1 +1,2 @@
-050922ecaaca5781fdf6631ea92bc715183f202f9d2f15147226f023414f619a
+0222beed0080fd07f1ee93c5bbeb2e05420b555b9cda725e3a0c299d8cea7cfa
+a660d1b7d4d2ef9759de6ad360d5fa9eed3625a6548068a97df2dd706edf2dd0
diff --git a/extra/llvm/sources b/extra/llvm/sources
index 607e3c70..85bc8aaa 100644
--- a/extra/llvm/sources
+++ b/extra/llvm/sources
@@ -1 +1,2 @@
 https://github.com/llvm/llvm-project/releases/download/llvmorg-VERSION/llvm-VERSION.src.tar.xz
+https://github.com/llvm/llvm-project/releases/download/llvmorg-VERSION/cmake-VERSION.src.tar.xz
diff --git a/extra/llvm/version b/extra/llvm/version
index 4de48ee7..d24d2bbd 100644
--- a/extra/llvm/version
+++ b/extra/llvm/version
@@ -1 +1 @@
-14.0.6 1
+15.0.1 1