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Help required for TCL 8.6.10 32 bits compile on Centos Linux
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JP C
Jan 15, 2021, 8:52:59 PM1/15/21
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Hi,
so, got to have a 32bit version of TCL to run on 64 bits machines (Centos). So, downloaded everything, did
./configure --disable-64bit -prefix=/temp/tcl8.6.10
make CFLAGS="-m32 -D_USE_32BIT_TIME_T=1" LDFLAGS="-m32"
It created the 32 bits executable, but there is a problem with the "clock format command" (for exmaple):
$ tclsh
% clock format [clock seconds]
integer value too large to represent
%
The errors comes from file tclObj.c, line 3127. So, is missing something in my configure/make line or this is a bug ?
so, got to have a 32bit version of TCL to run on 64 bits machines (Centos). So, downloaded everything, did
./configure --disable-64bit -prefix=/temp/tcl8.6.10
make CFLAGS="-m32 -D_USE_32BIT_TIME_T=1" LDFLAGS="-m32"
It created the 32 bits executable, but there is a problem with the "clock format command" (for exmaple):
$ tclsh
% clock format [clock seconds]
integer value too large to represent
%
The errors comes from file tclObj.c, line 3127. So, is missing something in my configure/make line or this is a bug ?
JP C
Jan 18, 2021, 11:56:23 PM1/18/21
to
The configure determines the system support long for the 64-bits integer and set TCL_WIDE_INT_IS_LONG to 1 to be used by gcc. When the compile comes with -m32, it is too late already since TCL_WIDE_INT_IS_LONG is set (via -D on the gcc command line). Since -DTCL_WIDE_INT_IS_LONG=1, the header file will force the use of long.
Now I did add '--build=i686 ' to the configure line and still got the 64-bit integer set to long and TCL_WIDE_INT_IS_LONG to 1. I would consider this incorrect since the 32 bit instruction set cannot not be using a long for 64 bits. There is a workaround (and may be an option I am not aware). Just set
export tcl_cv_type_64bit="long long"
before calling the configure and it will cache the 64-bits integer as a long long and works....
Final recipe (on Centos):
export tcl_cv_type_64bit="long long"
./configure --disable-64bit -prefix=/home/public/RND/AFW/tcl8.6.10
Harald Oehlmann
Jan 19, 2021, 5:29:01 AM1/19/21
to
thank you for the findings.
May I ask you for the following actions:
a) Test the just released 8.6.11 distribution
b) Report it as a bug ticket on core.tcl-lang.org/tcl
You may get a better audience there and your findings are not lost.
Thanks,
Harald
JP C
Jan 19, 2021, 11:27:03 AM1/19/21
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