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, 1 insertions, 1 deletions

diff --git a/arm-link.c b/arm-link.c
index 606f40e..aee35af 100644
--- a/arm-link.c
+++ b/arm-link.c
@@ -190,7 +190,7 @@ void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t
                 if (x & 0x800000)
                     x -= 0x1000000;
                 x <<= 2;
-                blx_avail = (TCC_ARM_VERSION >= 5);
+                blx_avail = (TCC_CPU_VERSION >= 5);
                 is_thumb = val & 1;
                 is_bl = (*(unsigned *) ptr) >> 24 == 0xeb;
                 is_call = (type == R_ARM_CALL || (type == R_ARM_PC24 && is_bl));