cc-wrapper: Unconditionally use @infixSalt@ accross the board

This is basically a sed job, in preparation of the next commit. The
rules are more or less:

- s"NIX_(.._WRAPPER_)?([a-zA-Z0-9@]*)"NIX_\1@infixSalt@_\2"g

- except for non-cc-wrapper-specific vars like `NIX_DEBUG`

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

···
 # `-B@out@/bin' forces cc to use ld-wrapper.sh when calling ld.
-export NIX_CFLAGS_COMPILE="-B@out@/bin/ $NIX_CFLAGS_COMPILE"
+export NIX_@infixSalt@_CFLAGS_COMPILE="-B@out@/bin/ $NIX_@infixSalt@_CFLAGS_COMPILE"
 
 # Export and assign separately in order that a failing $(..) will fail
 # the script.
 
 if [ -e @out@/nix-support/libc-cflags ]; then
-    export NIX_CFLAGS_COMPILE
-    NIX_CFLAGS_COMPILE="$(< @out@/nix-support/libc-cflags) $NIX_CFLAGS_COMPILE"
+    export NIX_@infixSalt@_CFLAGS_COMPILE
+    NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/libc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
 fi
 
 if [ -e @out@/nix-support/cc-cflags ]; then
-    export NIX_CFLAGS_COMPILE
-    NIX_CFLAGS_COMPILE="$(< @out@/nix-support/cc-cflags) $NIX_CFLAGS_COMPILE"
+    export NIX_@infixSalt@_CFLAGS_COMPILE
+    NIX_@infixSalt@_CFLAGS_COMPILE="$(< @out@/nix-support/cc-cflags) $NIX_@infixSalt@_CFLAGS_COMPILE"
 fi
 
 if [ -e @out@/nix-support/gnat-cflags ]; then
-    export NIX_GNATFLAGS_COMPILE
-    NIX_GNATFLAGS_COMPILE="$(< @out@/nix-support/gnat-cflags) $NIX_GNATFLAGS_COMPILE"
+    export NIX_@infixSalt@_GNATFLAGS_COMPILE
+    NIX_@infixSalt@_GNATFLAGS_COMPILE="$(< @out@/nix-support/gnat-cflags) $NIX_@infixSalt@_GNATFLAGS_COMPILE"
 fi
 
 if [ -e @out@/nix-support/libc-ldflags ]; then
-    export NIX_LDFLAGS
-    NIX_LDFLAGS+=" $(< @out@/nix-support/libc-ldflags)"
+    export NIX_@infixSalt@_LDFLAGS
+    NIX_@infixSalt@_LDFLAGS+=" $(< @out@/nix-support/libc-ldflags)"
 fi
 
 if [ -e @out@/nix-support/cc-ldflags ]; then
-    export NIX_LDFLAGS
-    NIX_LDFLAGS+=" $(< @out@/nix-support/cc-ldflags)"
+    export NIX_@infixSalt@_LDFLAGS
+    NIX_@infixSalt@_LDFLAGS+=" $(< @out@/nix-support/cc-ldflags)"
 fi
 
 if [ -e @out@/nix-support/libc-ldflags-before ]; then
-    export NIX_LDFLAGS_BEFORE
-    NIX_LDFLAGS_BEFORE="$(< @out@/nix-support/libc-ldflags-before) $NIX_LDFLAGS_BEFORE"
+    export NIX_@infixSalt@_LDFLAGS_BEFORE
+    NIX_@infixSalt@_LDFLAGS_BEFORE="$(< @out@/nix-support/libc-ldflags-before) $NIX_@infixSalt@_LDFLAGS_BEFORE"
 fi
 
-export NIX_CC_WRAPPER_FLAGS_SET=1
+export NIX_CC_WRAPPER_@infixSalt@_FLAGS_SET=1

pkgs/build-support/cc-wrapper/cc-wrapper.sh

···
     PATH="@coreutils_bin@/bin:@gnugrep_bin@/bin"
 fi
 
-if [ -n "$NIX_CC_WRAPPER_START_HOOK" ]; then
-    source "$NIX_CC_WRAPPER_START_HOOK"
+if [ -n "$NIX_CC_WRAPPER_@infixSalt@_START_HOOK" ]; then
+    source "$NIX_CC_WRAPPER_@infixSalt@_START_HOOK"
 fi
 
-if [ -z "$NIX_CC_WRAPPER_FLAGS_SET" ]; then
+if [ -z "$NIX_CC_WRAPPER_@infixSalt@_FLAGS_SET" ]; then
     source @out@/nix-support/add-flags.sh
 fi
 
···
         nonFlagArgs=1
     elif [ "$p" = -m32 ]; then
         if [ -e @out@/nix-support/dynamic-linker-m32 ]; then
-            NIX_LDFLAGS+=" -dynamic-linker $(< @out@/nix-support/dynamic-linker-m32)"
+            NIX_@infixSalt@_LDFLAGS+=" -dynamic-linker $(< @out@/nix-support/dynamic-linker-m32)"
         fi
     fi
     n+=1
···
 
 
 # Clear march/mtune=native -- they bring impurity.
-if [ "$NIX_ENFORCE_NO_NATIVE" = 1 ]; then
+if [ "$NIX_@infixSalt@_ENFORCE_NO_NATIVE" = 1 ]; then
     rest=()
     for p in "${params[@]}"; do
         if [[ "$p" = -m*=native ]]; then
···
 
 if [[ "$isCpp" = 1 ]]; then
     if [[ "$cppInclude" = 1 ]]; then
-        NIX_CFLAGS_COMPILE+=" ${NIX_CXXSTDLIB_COMPILE-@default_cxx_stdlib_compile@}"
+        NIX_@infixSalt@_CFLAGS_COMPILE+=" ${NIX_@infixSalt@_CXXSTDLIB_COMPILE-@default_cxx_stdlib_compile@}"
     fi
-    NIX_CFLAGS_LINK+=" $NIX_CXXSTDLIB_LINK"
+    NIX_@infixSalt@_CFLAGS_LINK+=" $NIX_@infixSalt@_CXXSTDLIB_LINK"
 fi
 
 source @out@/nix-support/add-hardening.sh
 
 # Add the flags for the C compiler proper.
-extraAfter=($NIX_CFLAGS_COMPILE "${hardeningCFlags[@]}")
+extraAfter=($NIX_@infixSalt@_CFLAGS_COMPILE "${hardeningCFlags[@]}")
 extraBefore=()
 
 if [ "$dontLink" != 1 ]; then
 
     # Add the flags that should only be passed to the compiler when
     # linking.
-    extraAfter+=($NIX_CFLAGS_LINK "${hardeningLDFlags[@]}")
+    extraAfter+=($NIX_@infixSalt@_CFLAGS_LINK "${hardeningLDFlags[@]}")
 
     # Add the flags that should be passed to the linker (and prevent
-    # `ld-wrapper' from adding NIX_LDFLAGS again).
-    for i in $NIX_LDFLAGS_BEFORE; do
+    # `ld-wrapper' from adding NIX_@infixSalt@_LDFLAGS again).
+    for i in $NIX_@infixSalt@_LDFLAGS_BEFORE; do
         extraBefore+=("-Wl,$i")
     done
-    for i in $NIX_LDFLAGS; do
+    for i in $NIX_@infixSalt@_LDFLAGS; do
         if [ "${i:0:3}" = -L/ ]; then
             extraAfter+=("$i")
         else
             extraAfter+=("-Wl,$i")
         fi
     done
-    export NIX_LDFLAGS_SET=1
+    export NIX_@infixSalt@_LDFLAGS_SET=1
 fi
 
 # As a very special hack, if the arguments are just `-v', then don't
···
     printf "  %q\n" "${extraAfter[@]}" >&2
 fi
 
-if [ -n "$NIX_CC_WRAPPER_EXEC_HOOK" ]; then
-    source "$NIX_CC_WRAPPER_EXEC_HOOK"
+if [ -n "$NIX_CC_WRAPPER_@infixSalt@_EXEC_HOOK" ]; then
+    source "$NIX_CC_WRAPPER_@infixSalt@_EXEC_HOOK"
 fi
 
 PATH="$path_backup"

pkgs/build-support/cc-wrapper/gnat-wrapper.sh

···
     PATH="@coreutils_bin@/bin"
 fi
 
-if [ -n "$NIX_GNAT_WRAPPER_START_HOOK" ]; then
-    source "$NIX_GNAT_WRAPPER_START_HOOK"
+if [ -n "$NIX_@infixSalt@_GNAT_WRAPPER_START_HOOK" ]; then
+    source "$NIX_@infixSalt@_GNAT_WRAPPER_START_HOOK"
 fi
 
-if [ -z "$NIX_GNAT_WRAPPER_FLAGS_SET" ]; then
+if [ -z "$NIX_@infixSalt@_GNAT_WRAPPER_FLAGS_SET" ]; then
     source @out@/nix-support/add-flags.sh
 fi
 
···
         nonFlagArgs=1
     elif [ "$i" = -m32 ]; then
         if [ -e @out@/nix-support/dynamic-linker-m32 ]; then
-            NIX_LDFLAGS+=" -dynamic-linker $(< @out@/nix-support/dynamic-linker-m32)"
+            NIX_@infixSalt@_LDFLAGS+=" -dynamic-linker $(< @out@/nix-support/dynamic-linker-m32)"
         fi
     fi
 done
···
 
 
 # Clear march/mtune=native -- they bring impurity.
-if [ "$NIX_ENFORCE_NO_NATIVE" = 1 ]; then
+if [ "$NIX_@infixSalt@_ENFORCE_NO_NATIVE" = 1 ]; then
     rest=()
     for p in "${params[@]}"; do
         if [[ "$p" = -m*=native ]]; then
···
 
 
 # Add the flags for the GNAT compiler proper.
-extraAfter=($NIX_GNATFLAGS_COMPILE)
+extraAfter=($NIX_@infixSalt@_GNATFLAGS_COMPILE)
 extraBefore=()
 
 if [ "$(basename "$0")x" = "gnatmakex" ]; then
···
 
 #if [ "$dontLink" != 1 ]; then
 #    # Add the flags that should be passed to the linker (and prevent
-#    # `ld-wrapper' from adding NIX_LDFLAGS again).
-#    for i in $NIX_LDFLAGS_BEFORE; do
+#    # `ld-wrapper' from adding NIX_@infixSalt@_LDFLAGS again).
+#    for i in $NIX_@infixSalt@_LDFLAGS_BEFORE; do
 #        extraBefore+=("-largs" "$i")
 #    done
-#    for i in $NIX_LDFLAGS; do
+#    for i in $NIX_@infixSalt@_LDFLAGS; do
 #        if [ "${i:0:3}" = -L/ ]; then
 #            extraAfter+=("$i")
 #        else
 #            extraAfter+=("-largs" "$i")
 #        fi
 #    done
-#    export NIX_LDFLAGS_SET=1
+#    export NIX_@infixSalt@_LDFLAGS_SET=1
 #fi
 
 # Optionally print debug info.
···
     printf "  %q\n" "${extraAfter[@]}" >&2
 fi
 
-if [ -n "$NIX_GNAT_WRAPPER_EXEC_HOOK" ]; then
-    source "$NIX_GNAT_WRAPPER_EXEC_HOOK"
+if [ -n "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK" ]; then
+    source "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK"
 fi
 
 PATH="$path_backup"

pkgs/build-support/cc-wrapper/gnatlink-wrapper.sh

···
 extraBefore=()
 
 ## Add the flags that should be passed to the linker (and prevent
-## `ld-wrapper' from adding NIX_LDFLAGS again).
-#for i in $NIX_LDFLAGS_BEFORE; do
+## `ld-wrapper' from adding NIX_@infixSalt@_LDFLAGS again).
+#for i in $NIX_@infixSalt@_LDFLAGS_BEFORE; do
 #    extraBefore+=("-largs" "$i")
 #done
-#for i in $NIX_LDFLAGS; do
+#for i in $NIX_@infixSalt@_LDFLAGS; do
 #    if [ "${i:0:3}" = -L/ ]; then
 #        extraAfter+=("$i")
 #    else
 #        extraAfter+=("-largs" "$i")
 #    fi
 #done
-#export NIX_LDFLAGS_SET=1
+#export NIX_@infixSalt@_LDFLAGS_SET=1
 
 # Optionally print debug info.
 if [ -n "$NIX_DEBUG" ]; then
···
     printf "  %q\n" "${extraAfter[@]}" >&2
 fi
 
-if [ -n "$NIX_GNAT_WRAPPER_EXEC_HOOK" ]; then
-    source "$NIX_GNAT_WRAPPER_EXEC_HOOK"
+if [ -n "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK" ]; then
+    source "$NIX_@infixSalt@_GNAT_WRAPPER_EXEC_HOOK"
 fi
 
 exec @prog@ "${extraBefore[@]}" "$@" "${extraAfter[@]}"

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

···
 #! @shell@
-set -e -o pipefail
+set -eu -o pipefail
 shopt -s nullglob
 
 path_backup="$PATH"
···
     PATH="@coreutils_bin@/bin"
 fi
 
-if [ -n "$NIX_LD_WRAPPER_START_HOOK" ]; then
-    source "$NIX_LD_WRAPPER_START_HOOK"
+if [ -n "$NIX_LD_WRAPPER_@infixSalt@_START_HOOK" ]; then
+    source "$NIX_LD_WRAPPER_@infixSalt@_START_HOOK"
 fi
 
-if [ -z "$NIX_CC_WRAPPER_FLAGS_SET" ]; then
+if [ -z "$NIX_CC_WRAPPER_@infixSalt@_FLAGS_SET" ]; then
     source @out@/nix-support/add-flags.sh
 fi
 
···
 # Optionally filter out paths not refering to the store.
 expandResponseParams "$@"
 if [[ "$NIX_ENFORCE_PURITY" = 1 && -n "$NIX_STORE"
-        && ( -z "$NIX_IGNORE_LD_THROUGH_GCC" || -z "$NIX_LDFLAGS_SET" ) ]]; then
+        && ( -z "$NIX_@infixSalt@_IGNORE_LD_THROUGH_GCC" || -z "$NIX_@infixSalt@_LDFLAGS_SET" ) ]]; then
     rest=()
     nParams=${#params[@]}
     declare -i n=0
···
 extraAfter=("${hardeningLDFlags[@]}")
 extraBefore=()
 
-if [ -z "$NIX_LDFLAGS_SET" ]; then
-    extraAfter+=($NIX_LDFLAGS)
-    extraBefore+=($NIX_LDFLAGS_BEFORE)
+if [ -z "$NIX_@infixSalt@_LDFLAGS_SET" ]; then
+    extraAfter+=($NIX_@infixSalt@_LDFLAGS)
+    extraBefore+=($NIX_@infixSalt@_LDFLAGS_BEFORE)
 fi
 
-extraAfter+=($NIX_LDFLAGS_AFTER $NIX_LDFLAGS_HARDEN)
+extraAfter+=($NIX_@infixSalt@_LDFLAGS_AFTER $NIX_@infixSalt@_LDFLAGS_HARDEN)
 
 declare -a libDirs
 declare -A libs
 relocatable=
 
 # Find all -L... switches for rpath, and relocatable flags for build id.
-if [ "$NIX_DONT_SET_RPATH" != 1 ] || [ "$NIX_SET_BUILD_ID" = 1 ]; then
+if [ "$NIX_@infixSalt@_DONT_SET_RPATH" != 1 ] || [ "$NIX_@infixSalt@_SET_BUILD_ID" = 1 ]; then
     prev=
     for p in "${extraBefore[@]}" "${params[@]}" "${extraAfter[@]}"; do
         case "$prev" in
···
 
 
 # Add all used dynamic libraries to the rpath.
-if [ "$NIX_DONT_SET_RPATH" != 1 ]; then
+if [ "$NIX_@infixSalt@_DONT_SET_RPATH" != 1 ]; then
     # For each directory in the library search path (-L...),
     # see if it contains a dynamic library used by a -l... flag.  If
     # so, add the directory to the rpath.
···
 
 # Only add --build-id if this is a final link. FIXME: should build gcc
 # with --enable-linker-build-id instead?
-if [ "$NIX_SET_BUILD_ID" = 1 ] && [ ! "$relocatable" ]; then
+if [ "$NIX_@infixSalt@_SET_BUILD_ID" = 1 ] && [ ! "$relocatable" ]; then
     extraAfter+=(--build-id)
 fi
 
···
     printf "  %q\n" "${extraAfter[@]}" >&2
 fi
 
-if [ -n "$NIX_LD_WRAPPER_EXEC_HOOK" ]; then
-    source "$NIX_LD_WRAPPER_EXEC_HOOK"
+if [ -n "$NIX_LD_WRAPPER_@infixSalt@_EXEC_HOOK" ]; then
+    source "$NIX_LD_WRAPPER_@infixSalt@_EXEC_HOOK"
 fi
 
 PATH="$path_backup"

pkgs/build-support/cc-wrapper/setup-hook.sh

···
-addCVars () {
+ccWrapper_addCVars () {
     if [[ -d "$1/include" ]]; then
         export NIX_CFLAGS_COMPILE+=" ${ccIncludeFlag:--isystem} $1/include"
     fi
···
     fi
 }
 
-envHooks+=(addCVars)
+envHooks+=(ccWrapper_addCVars)
 
 # Note 1: these come *after* $out in the PATH (see setup.sh).
 # Note 2: phase separation makes this look useless to shellcheck.