gcc: Remove gcc <= 4.7.x

As per #222, in crosstool-NG >= 1.23.0, we will only support:

 [upstream supported gcc versions] - 1

As of this writing, these versions are:

* 5.2.0
* 4.9.3
* 4.8.5 (the -1, since development on 4.8.x is now closed)

I plan to keep 4.8.5 around because of some architectures having issues
with over-optimization or just faulty optimization in the 4.9.x and
possibly newer versions.

I also cleaned up a requirement for glibc to depend on >= gcc-4.6.x for
>= glibc-2.20, but since the lowest gcc we support after this change is
>= 4.8.5, this condition can go away.

Patches for older gcc versions are removed in the next commit.

This closes #222

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

2 files changed, 5 insertions, 146 deletions

diff --git a/config/cc/gcc.in b/config/cc/gcc.in
index e67e4354..bbc46bc4 100644
--- a/config/cc/gcc.in
+++ b/config/cc/gcc.in
@@ -64,60 +64,6 @@ config CC_GCC_V_4_8_5
     prompt "4.8.5"
     select CC_GCC_4_8
 
-config CC_GCC_V_linaro_4_7
-    bool
-    prompt "linaro-4.7-2014.06"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_4_7
-
-config CC_GCC_V_4_7_4
-    bool
-    prompt "4.7.4"
-    select CC_GCC_4_7
-
-config CC_GCC_V_linaro_4_6
-    bool
-    prompt "linaro-4.6-2013.05"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_4_6
-
-config CC_GCC_V_4_6_4
-    bool
-    prompt "4.6.4"
-    select CC_GCC_4_6
-
-config CC_GCC_V_linaro_4_5
-    bool
-    prompt "linaro-4.5-2012.03"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_4_5
-
-config CC_GCC_V_4_5_4
-    bool
-    prompt "4.5.4"
-    select CC_GCC_4_5
-
-config CC_GCC_V_linaro_4_4
-    bool
-    prompt "linaro-4.4-2011.02-0"
-    depends on CC_GCC_SHOW_LINARO
-    select CC_GCC_4_4
-
-config CC_GCC_V_4_4_7
-    bool
-    prompt "4.4.7"
-    select CC_GCC_4_4
-
-config CC_GCC_V_4_3_6
-    bool
-    prompt "4.3.6"
-    select CC_GCC_4_3
-
-config CC_GCC_V_4_2_4
-    bool
-    prompt "4.2.4"
-    select CC_GCC_4_2
-
 endchoice
 
 config CC_GCC_CUSTOM
@@ -140,79 +86,6 @@ config CC_GCC_CUSTOM_LOCATION
 
 endif #CC_GCC_CUSTOM
 
-config CC_GCC_4_2
-    bool
-    select CC_GCC_4_2_or_later
-
-config CC_GCC_4_2_or_later
-    bool
-
-config CC_GCC_4_3
-    bool
-    select CC_GCC_4_3_or_later
-    select CC_GCC_USE_GMP_MPFR
-    select CC_GCC_HAS_PKGVERSION_BUGURL
-
-config CC_GCC_4_3_or_later
-    bool
-    select CC_GCC_4_2_or_later
-
-config CC_GCC_4_4
-    bool
-    select CC_GCC_4_4_or_later
-    select CC_GCC_USE_GMP_MPFR
-    select CC_GCC_HAS_GRAPHITE
-    select CC_GCC_HAS_PKGVERSION_BUGURL
-
-config CC_GCC_4_4_or_later
-    bool
-    select CC_GCC_4_3_or_later
-
-config CC_GCC_4_5
-    bool
-    select CC_GCC_4_5_or_later
-    select CC_GCC_USE_GMP_MPFR
-    select CC_GCC_USE_MPC
-    select CC_GCC_HAS_GRAPHITE
-    select CC_GCC_HAS_LTO
-    select CC_GCC_HAS_PKGVERSION_BUGURL
-    select CC_GCC_HAS_BUILD_ID
-
-config CC_GCC_4_5_or_later
-    bool
-    select CC_GCC_4_4_or_later
-
-config CC_GCC_4_6
-    bool
-    select CC_GCC_4_6_or_later
-    select CC_GCC_USE_GMP_MPFR
-    select CC_GCC_USE_MPC
-    select CC_GCC_HAS_GRAPHITE
-    select CC_GCC_HAS_LTO
-    select CC_GCC_HAS_PKGVERSION_BUGURL
-    select CC_GCC_HAS_BUILD_ID
-    select CC_GCC_HAS_LIBQUADMATH
-
-config CC_GCC_4_6_or_later
-    bool
-    select CC_GCC_4_5_or_later
-
-config CC_GCC_4_7
-    bool
-    select CC_GCC_4_7_or_later
-    select CC_GCC_USE_GMP_MPFR
-    select CC_GCC_USE_MPC
-    select CC_GCC_HAS_GRAPHITE
-    select CC_GCC_HAS_LTO
-    select CC_GCC_HAS_PKGVERSION_BUGURL
-    select CC_GCC_HAS_BUILD_ID
-    select CC_GCC_HAS_LNK_HASH_STYLE
-    select CC_GCC_HAS_LIBQUADMATH
-
-config CC_GCC_4_7_or_later
-    bool
-    select CC_GCC_4_6_or_later
-
 config CC_GCC_4_8
     bool
     select CC_GCC_4_8_or_later
@@ -229,7 +102,6 @@ config CC_GCC_4_8
 
 config CC_GCC_4_8_or_later
     bool
-    select CC_GCC_4_7_or_later
 
 config CC_GCC_4_9
     bool
@@ -291,8 +163,7 @@ config CC_GCC_USE_GRAPHITE
     default y
     depends on CC_GCC_HAS_GRAPHITE
     select CLOOG_NEEDED if !CC_GCC_5_or_later
-    select PPL_NEEDED if !CC_GCC_4_8_or_later
-    select ISL_NEEDED if CC_GCC_4_8_or_later
+    select ISL_NEEDED
     help
       Enable the GRAPHITE loop optimsations.
       
@@ -316,7 +187,7 @@ config CC_GCC_USE_LTO
     bool
     default y
     depends on CC_GCC_HAS_LTO
-    select CC_GCC_USE_LIBELF if CC_GCC_4_5
+    select CC_GCC_USE_LIBELF
     help
       Enable the Link Time Optimisations.
 
@@ -372,22 +243,11 @@ config CC_GCC_VERSION
     default "4.9.3" if CC_GCC_V_4_9_3
     default "linaro-4.8-2015.06" if CC_GCC_V_linaro_4_8
     default "4.8.5" if CC_GCC_V_4_8_5
-    default "linaro-4.7-2014.06" if CC_GCC_V_linaro_4_7
-    default "4.7.4" if CC_GCC_V_4_7_4
-    default "linaro-4.6-2013.05" if CC_GCC_V_linaro_4_6
-    default "4.6.4" if CC_GCC_V_4_6_4
-    default "linaro-4.5-2012.03" if CC_GCC_V_linaro_4_5
-    default "4.5.4" if CC_GCC_V_4_5_4
-    default "linaro-4.4-2011.02-0" if CC_GCC_V_linaro_4_4
-    default "4.4.7" if CC_GCC_V_4_4_7
-    default "4.3.6" if CC_GCC_V_4_3_6
-    default "4.2.4" if CC_GCC_V_4_2_4
 
 config CC_LANG_JAVA_USE_ECJ
     bool
     default y
     depends on CC_LANG_JAVA
-    depends on CC_GCC_4_3_or_later
 
 # Fortran always requires GMP+MPFR, whatever the gcc version
 config CC_LANG_FORTRAN
diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
index 577bf42e..b947668c 100644
--- a/config/cc/gcc.in.2
+++ b/config/cc/gcc.in.2
@@ -59,13 +59,13 @@ config CC_GCC_TARGET_FINAL
       tricks are not done and the compiler is build with all/install.
 
 config STATIC_TOOLCHAIN
-    select CC_GCC_STATIC_LIBSTDCXX if CC_GCC_4_4_or_later
+    bool
+    select CC_GCC_STATIC_LIBSTDCXX
 
 config CC_GCC_STATIC_LIBSTDCXX
     bool
     prompt "Link libstdc++ statically into the gcc binary"
     default y
-    depends on CC_GCC_4_4_or_later
     select WANTS_STATIC_LINK
     help
       Newer gcc versions use the PPL library which is C++ code.  Statically
@@ -142,7 +142,7 @@ config CC_GCC_LIBGOMP
       Interface (API) for multi-platform shared-memory parallel programming in
       C/C++ and Fortran". See:
         http://gcc.gnu.org/onlinedocs/libgomp/
-      
+
       The default is 'N'. Say 'Y' if you need it, and report success/failure.
 
 config CC_GCC_LIBSSP
@@ -229,7 +229,6 @@ config CC_GCC_LDBL_128
     tristate
     prompt "Enable 128-bit long doubles"
     default m
-    depends on CC_GCC_4_2_or_later
     help
       Saying 'Y' will force gcc to use 128-bit wide long doubles
       Saying 'N' will force gcc to use 64-bit wide long doubles