1.1 --- a/docs/overview.txt Fri Sep 14 21:58:55 2007 +0000
1.2 +++ b/docs/overview.txt Sat Sep 15 21:44:18 2007 +0000
1.3 @@ -493,24 +493,15 @@
1.4 the endianness suffixes
1.5 + return value: 0 upon success, !0 upon failure
1.6 + provides:
1.7 - - the environment variable CT_KERNEL_ARCH
1.8 - - optional
1.9 - - contains:
1.10 - the architecture name as understandable by the Linux kernel build
1.11 - system.
1.12 - Eg.: "arm" for an ARM
1.13 - "powerpc" for a PowerPC
1.14 - "i386" for an x86
1.15 - + provides:
1.16 + - mandatory
1.17 - the environment variable CT_TARGET_ARCH
1.18 - - mandatory
1.19 - contains:
1.20 the architecture part of the target tuple.
1.21 Eg.: "armeb" for big endian ARM
1.22 "i386" for an i386
1.23 + provides:
1.24 + - optional
1.25 - the environment variable CT_TARGET_SYS
1.26 - - optional
1.27 - contain:
1.28 the sytem part of the target tuple.
1.29 Eg.: "gnu" for glibc on most architectures
1.30 @@ -519,17 +510,53 @@
1.31 - for glibc-based toolchain: "gnu"
1.32 - for uClibc-based toolchain: "uclibc"
1.33 + provides:
1.34 - - the environment variable CT_ARCH_ENDIAN_OPT
1.35 - optional
1.36 + - the environment variable CT_KERNEL_ARCH
1.37 - contains:
1.38 - the compiler option to set the endianness.
1.39 - Eg.: "-ml" for a Super-H little endian
1.40 - "-mbig-endian" for an ARM big endian
1.41 - /empty/ for x86 and x86_64
1.42 + the architecture name as understandable by the Linux kernel build
1.43 + system.
1.44 + Eg.: "arm" for an ARM
1.45 + "powerpc" for a PowerPC
1.46 + "i386" for an x86
1.47 - defaults to:
1.48 - - for bi-endian big endian architectures: "-mbig-endian"
1.49 - - for bi-endian little endian architectures: "-mlittle-endian"
1.50 - - for single-endian architectures: /empty/
1.51 + ${CT_ARCH}
1.52 + + provides:
1.53 + - optional
1.54 + - the environment variables to configure the cross-gcc
1.55 + - CT_ARCH_WITH_ARCH
1.56 + - CT_ARCH_WITH_ABI
1.57 + - CT_ARCH_WITH_CPU
1.58 + - CT_ARCH_WITH_TUNE
1.59 + - CT_ARCH_WITH_FPU
1.60 + - CT_ARCH_WITH_FLOAT
1.61 + - contain (defaults):
1.62 + - CT_ARCH_WITH_ARCH : the gcc ./configure switch to select architecture level ( "--with-arch=${CT_ARCH_ARCH}" )
1.63 + - CT_ARCH_WITH_ABI : the gcc ./configure switch to select ABI level ( "--with-abi=${CT_ARCH_ARCH}" )
1.64 + - CT_ARCH_WITH_CPU : the gcc ./configure switch to select CPU instruction set ( "--with-cpu=${CT_ARCH_ARCH}" )
1.65 + - CT_ARCH_WITH_TUNE : the gcc ./configure switch to select scheduling ( "--with-tune=${CT_ARCH_ARCH}" )
1.66 + - CT_ARCH_WITH_FPU : the gcc ./configure switch to select FPU type ( "--with-fpu=${CT_ARCH_ARCH}" )
1.67 + - CT_ARCH_WITH_FLOAT : the gcc ./configure switch to select floating point arithmetics ( "--with-float=soft" or /empty/ )
1.68 + + provides:
1.69 + - optional
1.70 + - the environment variables to pass to the cross-gcc to build target binaries
1.71 + - CT_ARCH_ARCH_CFLAG
1.72 + - CT_ARCH_ABI_CFLAG
1.73 + - CT_ARCH_CPU_CFLAG
1.74 + - CT_ARCH_TUNE_CFLAG
1.75 + - CT_ARCH_FPU_CFLAG
1.76 + - CT_ARCH_FLOAT_CFLAG
1.77 + - CT_ARCH_ENDIAN_CFLAG
1.78 + - contain (defaults):
1.79 + - CT_ARCH_ARCH_CFLAG : the gcc switch to select architecture level ( "-march=${CT_ARCH_ARCH}" )
1.80 + - CT_ARCH_ABI_CFLAG : the gcc switch to select ABI level ( "-mabi=${CT_ARCH_AABI}" )
1.81 + - CT_ARCH_CPU_CFLAG : the gcc switch to select CPU instruction set ( "-mcpu=${CT_ARCH_CPU}" )
1.82 + - CT_ARCH_TUNE_CFLAG : the gcc switch to select scheduling ( "-mtune=${CT_ARCH_TUNE}" )
1.83 + - CT_ARCH_FPU_CFLAG : the gcc switch to select FPU type ( "-mfpu=${CT_ARCH_FPU}" )
1.84 + - CT_ARCH_FLOAT_CFLAG : the gcc switch to choose floating point arithmetics ( "-msoft-float" or /empty/ )
1.85 + - CT_ARCH_ENDIAN_CFLAG : the gcc switch to choose big or little endian ( "-mbig-endian" or "-mlittle-endian" )
1.86 + - default to:
1.87 + see above.
1.88 +
1.89
1.90 Build scripts |
1.91 --------------*