--- a/build/autoconf/toolchain.m4
+++ b/build/autoconf/toolchain.m4
@@ -16,18 +16,16 @@ cat <<EOF > conftest.c
 COMPILER clang-cl _MSC_VER
 #else
 COMPILER msvc _MSC_FULL_VER
 #endif
 #elif defined(__clang__)
 COMPILER clang __clang_major__.__clang_minor__.__clang_patchlevel__
 #elif defined(__GNUC__)
 COMPILER gcc __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
-#elif defined(__INTEL_COMPILER)
-COMPILER icc __INTEL_COMPILER
 #endif
 EOF
 read dummy compiler CC_VERSION <<EOF
 $($CC -E $CPPFLAGS $CFLAGS conftest.c 2>/dev/null | grep COMPILER)
 EOF
 read dummy cxxcompiler CXX_VERSION <<EOF
 $($CXX -E $CPPFLAGS $CXXFLAGS conftest.c 2>/dev/null | grep COMPILER)
 EOF
@@ -63,23 +61,16 @@ if test "`echo | $LD -v 2>&1 | grep -c G
 fi
 
 if test "$compiler" = "msvc"; then
      MSVC_VERSION_FULL="$CXX_VERSION"
      CC_VERSION=`echo ${CC_VERSION} | cut -c 1-4`
      CXX_VERSION=`echo ${CXX_VERSION} | cut -c 1-4`
 fi
 
-INTEL_CC=
-INTEL_CXX=
-if test "$compiler" = "icc"; then
-   INTEL_CC=1
-   INTEL_CXX=1
-fi
-
 CLANG_CC=
 CLANG_CXX=
 CLANG_CL=
 if test "$compiler" = "clang"; then
     GNU_CC=1
     GNU_CXX=1
     CLANG_CC=1
     CLANG_CXX=1

--- a/js/src/old-configure.in
+++ b/js/src/old-configure.in
@@ -926,23 +926,17 @@ case "$target" in
     if test -z "$CLANG_CC"; then
        MOZ_OPTIMIZE_FLAGS="-freorder-blocks -fno-reorder-functions $MOZ_OPTIMIZE_FLAGS"
     fi
     # The Maemo builders don't know about this flag
     MOZ_ARM_VFP_FLAGS="-mfpu=vfp"
     ;;
 
 *-*linux*)
-    # Note: both GNU_CC and INTEL_CC are set when using Intel's C compiler.
-    # Similarly for GNU_CXX and INTEL_CXX.
-    if test "$INTEL_CC" -o "$INTEL_CXX"; then
-        # -Os has been broken on Intel's C/C++ compilers for quite a
-        # while; Intel recommends against using it.
-        MOZ_OPTIMIZE_FLAGS="-O2"
-    elif test "$GNU_CC" -o "$GNU_CXX"; then
+    if test "$GNU_CC" -o "$GNU_CXX"; then
         MOZ_PGO_OPTIMIZE_FLAGS="-O3"
         MOZ_OPTIMIZE_FLAGS="-O3"
         if test -z "$CLANG_CC"; then
            MOZ_OPTIMIZE_FLAGS="-freorder-blocks $MOZ_OPTIMIZE_FLAGS"
         fi
     fi
 
     case "${target_cpu}" in
@@ -2397,23 +2391,16 @@ AC_MSG_RESULT([$result])
 if test $result = "yes"; then
   PROFILE_GEN_LDFLAGS="-fprofile-generate"
   PROFILE_USE_CFLAGS="-fprofile-use -fprofile-correction -Wcoverage-mismatch"
   PROFILE_USE_LDFLAGS="-fprofile-use"
 fi
 
 CFLAGS="$_SAVE_CFLAGS"
 
-if test -n "$INTEL_CC"; then
-  PROFILE_GEN_CFLAGS="-prof-gen -prof-dir ."
-  PROFILE_GEN_LDFLAGS=
-  PROFILE_USE_CFLAGS="-prof-use -prof-dir ."
-  PROFILE_USE_LDFLAGS=
-fi
-
 AC_SUBST(PROFILE_GEN_CFLAGS)
 AC_SUBST(PROFILE_GEN_LDFLAGS)
 AC_SUBST(PROFILE_USE_CFLAGS)
 AC_SUBST(PROFILE_USE_LDFLAGS)
 
 AC_LANG_CPLUSPLUS
 
 dnl ========================================================

--- a/old-configure.in
+++ b/old-configure.in
@@ -1332,23 +1332,17 @@ case "$target" in
     MOZ_GFX_OPTIMIZE_MOBILE=1
     MOZ_OPTIMIZE_FLAGS="-Os"
     if test -z "$CLANG_CC"; then
        MOZ_OPTIMIZE_FLAGS="-freorder-blocks -fno-reorder-functions $MOZ_OPTIMIZE_FLAGS"
     fi
     ;;
 
 *-*linux*)
-    # Note: both GNU_CC and INTEL_CC are set when using Intel's C compiler.
-    # Similarly for GNU_CXX and INTEL_CXX.
-    if test "$INTEL_CC" -o "$INTEL_CXX"; then
-        # -Os has been broken on Intel's C/C++ compilers for quite a
-        # while; Intel recommends against using it.
-        MOZ_OPTIMIZE_FLAGS="-O2"
-    elif test "$GNU_CC" -o "$GNU_CXX"; then
+    if test "$GNU_CC" -o "$GNU_CXX"; then
         MOZ_PGO_OPTIMIZE_FLAGS="-O3"
         MOZ_OPTIMIZE_FLAGS="-Os"
         if test -z "$CLANG_CC"; then
            MOZ_OPTIMIZE_FLAGS="-freorder-blocks $MOZ_OPTIMIZE_FLAGS"
         fi
     fi
 
     MOZ_MEMORY=1
@@ -6404,23 +6398,16 @@ AC_MSG_RESULT([$result])
 if test $result = "yes"; then
   PROFILE_GEN_LDFLAGS="-fprofile-generate"
   PROFILE_USE_CFLAGS="-fprofile-use -fprofile-correction -Wcoverage-mismatch"
   PROFILE_USE_LDFLAGS="-fprofile-use"
 fi
 
 CFLAGS="$_SAVE_CFLAGS"
 
-if test -n "$INTEL_CC"; then
-  PROFILE_GEN_CFLAGS="-prof-gen -prof-dir ."
-  PROFILE_GEN_LDFLAGS=
-  PROFILE_USE_CFLAGS="-prof-use -prof-dir ."
-  PROFILE_USE_LDFLAGS=
-fi
-
 AC_SUBST(PROFILE_GEN_CFLAGS)
 AC_SUBST(PROFILE_GEN_LDFLAGS)
 AC_SUBST(PROFILE_USE_CFLAGS)
 AC_SUBST(PROFILE_USE_LDFLAGS)
 
 fi # ! SKIP_COMPILER_CHECKS
 
 AC_DEFINE(CPP_THROW_NEW, [throw()])