bintools-wrapper: skip dynamic linker for static binaries

pkgs/build-support/bintools-wrapper/add-flags.sh

@@ -3,6 +3,7 @@ var_templates_list=(
     NIX_IGNORE_LD_THROUGH_GCC
     NIX_LDFLAGS
     NIX_LDFLAGS_BEFORE
+    NIX_DYNAMIC_LINKER
     NIX_LDFLAGS_AFTER
     NIX_LDFLAGS_HARDEN
     NIX_HARDENING_ENABLE
@@ -25,6 +26,10 @@ if [ -e @out@/nix-support/libc-ldflags ]; then
     NIX_LDFLAGS_@suffixSalt@+=" $(< @out@/nix-support/libc-ldflags)"
 fi
 
+if [ -z "$NIX_DYNAMIC_LINKER_@suffixSalt@" ] && [ -e @out@/nix-support/ld-set-dynamic-linker ]; then
+    NIX_DYNAMIC_LINKER_@suffixSalt@="$(< @out@/nix-support/dynamic-linker)"
+fi
+
 if [ -e @out@/nix-support/libc-ldflags-before ]; then
     NIX_LDFLAGS_BEFORE_@suffixSalt@="$(< @out@/nix-support/libc-ldflags-before) $NIX_LDFLAGS_BEFORE_@suffixSalt@"
 fi

pkgs/build-support/bintools-wrapper/default.nix

@@ -237,19 +237,14 @@ stdenv.mkDerivation {
       if [ -n "''${dynamicLinker-}" ]; then
         echo $dynamicLinker > $out/nix-support/dynamic-linker
 
-    '' + (if targetPlatform.isDarwin then ''
-        printf "export LD_DYLD_PATH=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
-      '' else ''
-        if [ -e ${libc_lib}/lib/32/ld-linux.so.2 ]; then
-          echo ${libc_lib}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
-        fi
-      ''
-      # The dynamic linker is passed in `ldflagsBefore' to allow
-      # explicit overrides of the dynamic linker by callers to ld
-      # (the *last* value counts, so ours should come first).
-      + ''
-        echo -dynamic-linker "$dynamicLinker" >> $out/nix-support/libc-ldflags-before
-    '') + ''
+        ${if targetPlatform.isDarwin then ''
+          printf "export LD_DYLD_PATH=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
+        '' else ''
+          if [ -e ${libc_lib}/lib/32/ld-linux.so.2 ]; then
+            echo ${libc_lib}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
+          fi
+          touch $out/nix-support/ld-set-dynamic-linker
+        ''}
       fi
     '')
 

pkgs/build-support/bintools-wrapper/ld-wrapper.sh

@@ -20,6 +20,7 @@ if [ -z "${NIX_BINTOOLS_WRAPPER_FLAGS_SET_@suffixSalt@:-}" ]; then
     source @out@/nix-support/add-flags.sh
 fi
 
+setDynamicLinker=1
 
 # Optionally filter out paths not refering to the store.
 expandResponseParams "$@"
@@ -47,6 +48,11 @@ if [[ "${NIX_ENFORCE_PURITY:-}" = 1 && -n "${NIX_STORE:-}"
             # Our ld is not built with sysroot support (Can we fix that?)
             :
         else
+            if [[ "$p" = -static || "$p" = -static-pie ]]; then
+                # Using a dynamic linker for static binaries can lead to crashes.
+                # This was observed for rust binaries.
+                setDynamicLinker=0
+            fi
             rest+=("$p")
         fi
         n+=1
@@ -63,6 +69,11 @@ extraBefore=(${hardeningLDFlags[@]+"${hardeningLDFlags[@]}"})
 if [ -z "${NIX_LDFLAGS_SET_@suffixSalt@:-}" ]; then
     extraAfter+=($NIX_LDFLAGS_@suffixSalt@)
     extraBefore+=($NIX_LDFLAGS_BEFORE_@suffixSalt@)
+    # By adding dynamic linker to extraBefore we allow the users set their
+    # own dynamic linker as NIX_LD_FLAGS will override earlier set flags
+    if [[ "$setDynamicLinker" = 1 && -n "$NIX_DYNAMIC_LINKER_@suffixSalt@" ]]; then
+        extraBefore+=("-dynamic-linker" "$NIX_DYNAMIC_LINKER_@suffixSalt@")
+    fi
 fi
 
 extraAfter+=($NIX_LDFLAGS_AFTER_@suffixSalt@)
@@ -134,7 +145,7 @@ then
     done
 fi
 
-if [ -e "@out@/nix-support/dynamic-linker-m32" ] && (( "$link32" )); then
+if [[ "$link32" = "1" && "$setDynamicLinker" = 1 && -e "@out@/nix-support/dynamic-linker-m32" ]]; then
     # We have an alternate 32-bit linker and we're producing a 32-bit ELF, let's
     # use it.
     extraAfter+=(