[groff] 27/35: [chem]: Rely on build system to define `PERL`.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit cf00457c283d7fd3c6c6bbf888ac2a3fcfce00a3
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Mon Dec 9 02:54:51 2024 -0600

    [chem]: Rely on build system to define `PERL`.
    
    * contrib/chem/chem.am (chem): Use sed to replace magic token `@PERL@`
      with contents of `PERL` macro, determined by groff configure script.
    
    * contrib/chem/chem.pl: Rewrite shebang line to use the magic token.
---
 contrib/chem/ChangeLog | 6 ++++++
 contrib/chem/chem.am   | 2 +-
 contrib/chem/chem.pl   | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/contrib/chem/ChangeLog b/contrib/chem/ChangeLog
index ecedb1410..45e37a721 100644
--- a/contrib/chem/ChangeLog
+++ b/contrib/chem/ChangeLog
@@ -1,3 +1,9 @@
+2024-12-09  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * chem.am (chem): Use sed to replace magic token `@PERL@` with
+       contents of `PERL` macro, determined by groff configure script.
+       * chem.pl: Rewrite shebang line to use the magic token.
+
 2023-07-17  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        * chem.pl: Stop endorsing shebang line space myth.  See
diff --git a/contrib/chem/chem.am b/contrib/chem/chem.am
index abee480f0..27c977640 100644
--- a/contrib/chem/chem.am
+++ b/contrib/chem/chem.am
@@ -27,7 +27,6 @@ prefixexecbin_SCRIPTS += chem
 chempicdir = $(datasubdir)/pic
 dist_chempic_DATA = contrib/chem/chem.pic
 
-
 CHEM_GENEXAMPLES = contrib/chem/examples/README
 CHEM_EXAMPLES =  \
   contrib/chem/examples/atp.chem \
@@ -78,6 +77,7 @@ contrib/chem/examples/122/README: 
$(chem_srcdir)/examples/122/README.txt
 chem: $(chem_srcdir)/chem.pl $(SH_DEPS_SED_SCRIPT)
        $(AM_V_GEN)$(RM) $@ \
        && sed -f "$(SH_DEPS_SED_SCRIPT)" \
+              -e "s|[@]PERL[@]|$(PERL)|" \
               -e "s|[@]g[@]|$(g)|g" \
               -e "s|[@]BINDIR[@]|$(DESTDIR)$(bindir)|g" \
               -e "s|[@]MACRODIR[@]|$(DESTDIR)$(tmacdir)|g" \
diff --git a/contrib/chem/chem.pl b/contrib/chem/chem.pl
index 1a2c1b6ff..d91d6ff4a 100755
--- a/contrib/chem/chem.pl
+++ b/contrib/chem/chem.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/env perl
+#!@PERL@
 
 # chem - a groff preprocessor for producing chemical structure diagrams