[bug #54703] Incorrection expansion of := accumulator under $(eval …)

[Vincent Belaïche]

Follow-up Comment #3, bug #54703 (project make):

Dear both,

Thank you so much for your help.

I must admit that being familiar with MSDos, M4 and TeX, I should have paid
more attention to this aspect.

I was quite aware of doubling the $ when it concerned producing recipes with
eval, for the shell commands to get/make the right input/output.
But I must admit that despite the example given in the documentation tackles
also this point, I had not paid too much attention to using eval with building
up variables content.

I have tried to capture the good words from Michael in a contribution
attached. Please feel free to use it or not.

BTW, FYI, I tried to compile make.texi, but I could not because version.texi
was missing, so I tried the bootstrap + configure scripts, and I got this
error:

./configure: line 12435: PKG_PROG_PKG_CONFIG: command not found
./configure: line 12444: syntax error near unexpected token `guile-$v,'
./configure: line 12444: `    PKG_CHECK_EXISTS(guile-$v, guile_version=$v;
have_guile=yes; break, )'

I am on Mac OS 10,13,6

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