linux - Perform substitution in a substitution file with autotools -

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i have tried around , cannot seem find correct information. substitute @srcdir@ in file used ac_subst_file. possible?

ac_output doesn't allow 2 substitution steps, don't think that's possible. however, this:

my_substitution_file:

srcdir %srcdir%

configure.ac:

ac_prog_sed file=my_substitution_file ac_subst_file([file]) ac_config_files([my_file.in]) ac_output

makefile.am:

my_file: my_file.in makefile     $(am_v_gen)$(sed) -e s,%srcdir%,$(srcdir), <$< >$@

my_file.in.in:

here my_substitution_file has say: @file@

all together, should result in file called my_file contents:

here my_substitution_file has say: srcdir /path/to/your/source

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