configure: --config-musl/-uClibc switch & misc cleanups

- configure:
  - add --config-uClibc,-musl switch and suggest to use
    it if uClibc/musl is detected
  - make warning options magic clang compatible
  - simplify (use $confvars instead of individual options)
- Revert "Remove some unused-parameter lint"
  7443db0d5f841b81a55e918bf8c228dd20f9ddb2
  rather use -Wno-unused-parameter (or just not -Wextra)
- #ifdef functions that are unused on some targets
- tccgen.c: use PTR_SIZE==8 instead of (X86_64 || ARM64)
- tccpe.c: fix some warnings
- integrate dummy arm-asm better

1 files changed, 2 insertions, 6 deletions

diff --git a/arm-gen.c b/arm-gen.c
index d11b1ec..8384781 100644
--- a/arm-gen.c
+++ b/arm-gen.c
@@ -34,8 +34,8 @@
 #define NB_REGS             9
 #endif
 
-#ifndef TCC_ARM_VERSION
-# define TCC_ARM_VERSION 5
+#ifndef TCC_CPU_VERSION
+# define TCC_CPU_VERSION 5
 #endif
 
 /* a register can belong to several classes. The classes must be
@@ -2149,7 +2149,3 @@ ST_FUNC void gen_vla_alloc(CType *type, int align) {
 /*************************************************************/
 #endif
 /*************************************************************/
-
-// #ifndef TCC_IS_NATIVE
-#include "arm-asm.c"
-// #endif