cc/gcc: add support for 4.5.0 or later versions

starting with 4.5.0, gcc requires libelf.

config/cc/gcc.in

@@ -121,6 +121,14 @@ config CC_GCC_4_4_or_later
     select CC_GCC_4_2_or_later
     select CC_GCC_USE_PPL_CLOOG_MPC
 
+config CC_GCC_4_5_or_later
+    bool
+    default n
+    select CC_GCC_4_4_or_later
+    select CC_GCC_4_3_or_later
+    select CC_GCC_4_2_or_later
+    select CC_GCC_USE_LIBELF
+
 config CC_GCC_USE_GMP_MPFR
     bool
     default n
@@ -134,6 +142,11 @@ config CC_GCC_USE_PPL_CLOOG_MPC
     select CLOOG
     select MPC
 
+config CC_GCC_USE_LIBELF
+    bool
+    default n
+    select LIBELF
+
 config CC_VERSION
     string
 # Don't remove next line

scripts/addToolVersion.sh

@@ -100,7 +100,10 @@ addToolVersion() {
             ver_M=$(echo "${version}...." |cut -d . -f 1)
             ver_m=$(echo "${version}...." |cut -d . -f 2)
             if [    ${ver_M} -gt 4                          \
-                 -o \( ${ver_M} -eq 4 -a ${ver_m} -ge 4 \)  ]; then
+                 -o \( ${ver_M} -eq 4 -a ${ver_m} -ge 5 \)  ]; then
+                SedExpr1="${SedExpr1}\n    select CC_GCC_4_5_or_later"
+            elif [    ${ver_M} -gt 4                          \
+                   -o \( ${ver_M} -eq 4 -a ${ver_m} -ge 4 \)  ]; then
                 SedExpr1="${SedExpr1}\n    select CC_GCC_4_4_or_later"
             elif [    ${ver_M} -gt 4                          \
                    -o \( ${ver_M} -eq 4 -a ${ver_m} -ge 3 \)  ]; then

scripts/build/cc/gcc.sh

@@ -171,6 +171,9 @@ do_cc_core() {
         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
     fi
+    if [ "${CT_CC_GCC_USE_LIBELF}" = "y" ]; then
+        extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
+    fi
 
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
@@ -333,6 +336,9 @@ do_cc() {
         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
         extra_config+=("--with-mpc=${CT_COMPLIBS_DIR}")
     fi
+    if [ "${CT_CC_GCC_USE_LIBELF}" = "y" ]; then
+        extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
+    fi
 
     if [ "${CT_THREADS}" = "none" ]; then
         extra_config+=("--disable-threads")