1 files changed, 74 insertions, 0 deletions
diff --git a/pkgs/build-support/gcc-wrapper/gcc-wrapper.sh b/pkgs/build-support/gcc-wrapper/gcc-wrapper.sh
new file mode 100644
index 0000000000000..59f38086f3250
--- /dev/null
+++ b/pkgs/build-support/gcc-wrapper/gcc-wrapper.sh
@@ -0,0 +1,74 @@
+#! /bin/sh
+
+if test -n "$NIX_GCC_WRAPPER_START_HOOK"; then
+    . "$NIX_GCC_WRAPPER_START_HOOK"
+fi
+
+if test -z "$NIX_GLIBC_FLAGS_SET"; then
+    NIX_CFLAGS_COMPILE="@cflagsCompile@ $NIX_CFLAGS_COMPILE"
+    NIX_CFLAGS_LINK="@cflagsLink@ $NIX_CFLAGS_LINK"
+    NIX_LDFLAGS="@ldflags@ $NIX_LDFLAGS"
+fi
+
+# Figure out if linker flags should be passed.  GCC prints annoying
+# warnings when they are not needed.
+dontLink=0
+if test "$*" = "-v"; then
+    dontLink=1
+else    
+    for i in "$@"; do
+        if test "$i" = "-c"; then
+            dontLink=1
+        elif test "$i" = "-S"; then
+            dontLink=1
+        elif test "$i" = "-E"; then
+            dontLink=1
+        elif test "$i" = "-E"; then
+            dontLink=1
+        elif test "$i" = "-M"; then
+            dontLink=1
+        elif test "$i" = "-MM"; then
+            dontLink=1
+        fi
+    done
+fi
+
+# Add the flags for the C compiler proper.
+extra=($NIX_CFLAGS_COMPILE)
+
+if test "$dontLink" != "1"; then
+
+    # Add the flags that should only be passed to the compiler when
+    # linking.
+    extra=(${extra[@]} $NIX_CFLAGS_LINK)
+
+    # Add the flags that should be passed to the linker (and prevent
+    # `ld-wrapper' from adding NIX_LDFLAGS again).
+    for i in $NIX_LDFLAGS; do
+        extra=(${extra[@]} "-Wl,$i")
+    done
+    export NIX_LDFLAGS_SET=1
+
+    if test "$NIX_STRIP_DEBUG" = "1"; then
+        # Add executable-stripping flags.
+        extra=(${extra[@]} $NIX_CFLAGS_STRIP)
+    fi
+fi
+
+# Optionally print debug info.
+if test "$NIX_DEBUG" = "1"; then
+  echo "original flags to @gcc@:" >&2
+  for i in "$@"; do
+      echo "  $i" >&2
+  done
+  echo "extra flags to @gcc@:" >&2
+  for i in ${extra[@]}; do
+      echo "  $i" >&2
+  done
+fi
+
+if test -n "$NIX_GCC_WRAPPER_EXEC_HOOK"; then
+    . "$NIX_GCC_WRAPPER_EXEC_HOOK"
+fi
+
+exec @gcc@ "$@" ${extra[@]}