Ken Takata wrote:
> 2018/8/7 Tue 10:48:19 UTC+9 Michael Soyka wrote:
> > On 8/6/2018 8:45 PM, Ken Takata wrote:
[...]
> > >> It appears src/Make_cyg_ming.mak also does this:
> > >>
> > >> ifneq (sh.exe, $(SHELL))
> > >> DEL = rm
> > >> MKDIR = mkdir -p
> > >> DIRSLASH = /
> > >> else
> > >> DEL = del
> > >> MKDIR = mkdir
> > >> DIRSLASH = \\
> > >> endif
> > >>
> > >> And src/GvimExt/Make_ming.mak
> > >>
> > >> ifneq (sh.exe, $(SHELL))
> > >> DEL = rm
> > >> else
> > >> DEL = del
> > >> endif
> > >>
> > >> Is this really wrong?
> > > No. This is really confusing, but this is correct.
> > >
> > > If the makefile is executed by the "mingw32-make" command from cmd.exe,
> > > $SHELL is set to "sh.exe" (without any path). In this case, unix-like
> > > commands
> > > might not work and dos-style path is needed.
> > I run mingw32-make from a command window and, as I've stated, the value
> > of SHELL includes a path specification.
>
> Ah, running from cmd.exe or bash was not the cause of the difference.
> The difference is caused by the $PATH.
>
> If sh.exe is found in the $PATH, $SHELL is set to the full path of the sh.exe.
> If it isn't found, $SHELL is set to "sh.exe" without the path specification.
>
> So the conclusion is still not changed. The makefiles are correct. If $SHELL
> is exactly same as "sh.exe", unix-like commands are not available and paths
> must be dos-style, otherwise unix-like commands and unix-style paths can be
> used.
Since this is confusing, it would be good to add an explanation. How
about this:
# About the "sh.exe" condition, as explained by Ken Takata:
#
# If the makefile is executed and sh.exe is not found in $PATH, then
$SHELL is
# set to "sh.exe" (without any path). In this case, unix-like commands
might
# not work and a dos-style path is needed.
#
# If the makefile is executed and sh.exe IS found in $PATH, then $SHELL
is set
# with the actual path of sh.exe (e.g. "C:/msys64/usr/bin/sh.exe").
In this
# case, unix-like commands can be used.
#
# If it is executed by the "make" command from cmd.exe, $SHELL is set to
# "/bin/sh". If the "make" command is in the $PATH, other unix-like
commands
# might also work.
#
# If it is executed by the "make" command from a unix-like shell,
# $SHELL is set with the unix-style path (e.g. "/bin/bash").
# In this case, unix-like commands can be used.
#
ifneq (sh.exe, $(SHELL))
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