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For most users, no GCC versions string is needed when doing an "msrt
bootstrap" in which case the default SRT_CXX of "GCC" is used. When
subsequent builds are done the "g++" executable which is first found
in your "$PATH" will be used for building the code.
The only reason why an SRT_CXX value other than "GCC" would be needed
is if one of the situations were true:
If any of these were to apply you might want to specify a GCC version
string when bootstrapping with msrt by doing the following:
- SRT proper (SoftRelTools/) made a distinction between
versions of GCC (currently it doesn't)
- MINOS (SRT_MINOS/) made a distinction between versions of GCC
(currently it doesn't)
- Your local site (SRT_SITE) wanted to make a
distinction between versions of GCC. (unusual).
msrt bootstrap GCC_X_Y
for step number 4 in msrt's 12 Step
Likely candidates for that string and comments on them are below:
- GCC_3_2 : current stable, recommended version.
- GCC_3_1 : intermediate development unstable, not recommended.
- GCC_3_0 : older stable version, should work.
- GCC_2_95 : very old stable version, deprecated.
- EGCS_1_1 : (gcc 2.91) dead dead dead dead. Don't even think it.
If you already bootstrapped an SRT area and want to change this
compiler string simply edit $SRT_DIST/srt_envrc and
fix up the two SRT_CXX related variables.
Note 1: the SRT_SUBDIR is defined from
SRT_CXX. After a change, you may want to look for old
subdirs in the tmp/, lib/, bin/ and build-logs/ directories and remove
Note 2: regardless of how your source is configured you can
override the value of $SRT_CXX used by msrt at any time by
shell> srt_setup SRT_CXX=GCC_X_Y
shell> msrt -e <some-command>
Last Modified: $Date: 2002/11/22 22:06:54 $
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