Bug 1690937 - Build nasm with a sysroot. r=firefox-build-system-reviewers,sheehan,mhentges

For the same reason we used clang for sccache, we use clang here.

Differential Revision: https://phabricator.services.mozilla.com/D104130

taskcluster/ci/toolchain/nasm.yml

@@ -53,6 +53,8 @@ linux64-nasm:
     description: "nasm linux64 build"
     attributes:
         local-toolchain: true
+    worker:
+        docker-image: {in-tree: deb10-toolchain-build}
     treeherder:
         symbol: TL(nasm)
     run:
@@ -61,14 +63,22 @@ linux64-nasm:
     fetches:
         fetch:
             - nasm-2.14.02
+        toolchain:
+            - linux64-clang-11
+            - linux64-sysroot
 
 linux64-nasm-2.14.02:
     description: "nasm linux64 minimum supported version build"
     treeherder:
         symbol: TL(nasm-2.14.02)
+    worker:
+        docker-image: {in-tree: deb10-toolchain-build}
     run:
         script: build-nasm.sh
         arguments: ['linux64']
     fetches:
         fetch:
             - nasm-2.14.02
+        toolchain:
+            - linux64-clang-11
+            - linux64-sysroot

taskcluster/scripts/misc/build-nasm.sh

@@ -39,7 +39,7 @@ index de99d076..47031e12 100644
      if (is_elf32()) {
          WRITELONG(pbuf,0);  /* null  beginning offset */
 EOF
-        ./configure
+        ./configure CC="$MOZ_FETCHES_DIR/clang/bin/clang" CFLAGS="--sysroot=$MOZ_FETCHES_DIR/sysroot"
         EXE=
         ;;
 esac