CI: move PKG_CONFIG_PATH into shell script

Author: MikeWang000000

.github/workflows/ci.yml

@@ -111,15 +111,13 @@ jobs:
       - name: Set up toolchain for ${{ matrix.name }}
         run: |
           CROSS_TOOLCHAIN_URL="https://github.com/cross-tools/musl-cross/releases/download/20250520/${{ matrix.triplet }}.tar.xz"
-          PKG_CONFIG_PATH="${{ env.cross_dir }}/${{ matrix.triplet }}/${{ matrix.triplet }}/sysroot/usr/lib/pkgconfig"
 
           sudo mkdir -m 777 -p "${{ env.cross_dir }}"
           env \
               CROSS_TRIPLET="${{ matrix.triplet }}" \
               CROSS_TOOLCHAIN_URL="$CROSS_TOOLCHAIN_URL" \
               CROSS_TOOLCHAIN_SHA256="${{ matrix.sha256 }}" \
               CROSS_DIR="${{ env.cross_dir }}" \
-              PKG_CONFIG_PATH="$PKG_CONFIG_PATH" \
               .github/workflows/scripts/cross-setup.sh
       - name: Build for ${{ matrix.name }}
         run: |

.github/workflows/scripts/cross-setup.sh

@@ -12,7 +12,8 @@ CROSS_BASE="$CROSS_DIR/$CROSS_TRIPLET"
 CROSS_SRC="$CROSS_BASE/src"
 CROSS_USR="$CROSS_BASE/$CROSS_TRIPLET/sysroot/usr"
 PATH="$CROSS_BASE/bin:$PATH"
-export PATH
+PKG_CONFIG_PATH="$CROSS_DIR/$CROSS_TRIPLET/$CROSS_TRIPLET/sysroot/usr/lib/pkgconfig"
+export PATH PKG_CONFIG_PATH
 
 libmnl_name=libmnl-1.0.5
 libmnl_tar=$libmnl_name.tar.bz2