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Diffstat (limited to 'README')
| -rw-r--r-- | README | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -2323,6 +2323,26 @@ images ready for download to / installation on your system: - "u-boot" is an image in ELF binary format - "u-boot.srec" is in Motorola S-Record format +By default the build is performed locally and the objects are saved +in the source directory. One of the two methods can be used to change +this behavior and build U-Boot to some external directory: + +1. Add O= to the make command line invocations: + + make O=/tmp/build distclean + make O=/tmp/build NAME_config + make O=/tmp/build all + +2. Set environment variable BUILD_DIR to point to the desired location: + + export BUILD_DIR=/tmp/build + make distclean + make NAME_config + make all + +Note that the command line "O=" setting overrides the BUILD_DIR environment +variable. + Please be aware that the Makefiles assume you are using GNU make, so for instance on NetBSD you might need to use "gmake" instead of @@ -2376,6 +2396,22 @@ or to build on a native PowerPC system you can type CROSS_COMPILE=' ' MAKEALL +When using the MAKEALL script, the default behaviour is to build U-Boot +in the source directory. This location can be changed by setting the +BUILD_DIR environment variable. Also, for each target built, the MAKEALL +script saves two log files (<target>.ERR and <target>.MAKEALL) in the +<source dir>/LOG directory. This default location can be changed by +setting the MAKEALL_LOGDIR environment variable. For example: + + export BUILD_DIR=/tmp/build + export MAKEALL_LOGDIR=/tmp/log + CROSS_COMPILE=ppc_8xx- MAKEALL + +With the above settings build objects are saved in the /tmp/build, log +files are saved in the /tmp/log and the source tree remains clean during +the whole build process. + + See also "U-Boot Porting Guide" below. |