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doc: describe recent build checks for 32 bit time_t

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* README: Document the new handling of 32 bit time_t,
with examples of how to build in 64 bit mode on AIX.
Also mention that GNU make is desired on AIX
due to its mishandling of the "[" target.
Suggested by Assaf Gordon.
This commit is contained in:
Pádraig Brady 2017-12-22 12:33:30 +00:00
parent ba4b0bde2e
commit f4fec33607
1 changed files with 18 additions and 4 deletions
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@ -94,16 +94,30 @@ Here is one possible patch to correct the problem:
************************
OSF/1 4.0d build failure
OSF/1 4.0d and AIX build failures
------------------------
If you use /usr/bin/make on an OSF/1 4.0d system, it will fail due
to the presence of the "[" target. That version of make appears to
treat "[" as some syntax relating to locks. To work around that,
If you use /usr/bin/make on these systems, the build will fail due
to the presence of the "[" target. OSF/1 make(1) appears to
treat "[" as some syntax relating to locks, while AIX make(1)
appears to skip the "[" target. To work around these issues
the best solution is to use GNU make. Otherwise, simply remove
all mention of "[$(EXEEXT)" from src/Makefile.
************************
32 bit time_t build failures
------------------------
On systems where it's determined that 64 bit time_t is supported
(indicated by touch -t <some time after 2038>), but that coreutils
would be built with a narrower time_t, the build will fail.
This can be allowed by passing TIME_T_32_BIT_OK=yes to configure,
or avoided by enabling 64 bit builds. For example GCC on AIX defaults
to 32 bit, and to enable the 64 bit ABI one can use:
./configure CFLAGS=-maix64 LDFLAGs=-maix64 AR='ar -X64'
*************************************************
"make check" failure on IRIX 6.5 and Solaris <= 9
-------------------------------------------------