X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=configure.ac;h=008befe4ec06f01a1f3b9b01945a3f336d92222c;hb=240217637abf704a6e4701df46fe0c08d062300c;hp=984ecbce1d0f6389601d34913b5c02412a3002e3;hpb=ef52d35115c1e05795b8364d064feeeb978c6c87;p=lilypond.git

diff --git a/configure.ac b/configure.ac
index 984ecbce1d..008befe4ec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -120,7 +120,7 @@ STEPMAKE_LIB(REQUIRED)
 STEPMAKE_DLOPEN
 # Do not use bison 1.50 and 1.75.
 # 1.29 is required fr %locations, but I'm not sure it's enough --ns
-STEPMAKE_BISON(OPTIONAL, 1.29)
+STEPMAKE_BISON(REQUIRED, 1.29)
 STEPMAKE_FLEX(REQUIRED)
 STEPMAKE_FLEXLEXER(REQUIRED)
 STEPMAKE_FLEXLEXER_LOCATION
@@ -214,8 +214,8 @@ STEPMAKE_WINDOWS
 # guile executable for some scripts
 STEPMAKE_GUILE(OPTIONAL, 1.8.2, 1.9.0)
 
-# perl for help2man.
-STEPMAKE_PERL(OPTIONAL)
+# perl for help2man and for mf2pt1.pl
+STEPMAKE_PERL(REQUIRED)
 
 ## Optional tools for building documentation, website, extra fonts.
 if test "$DOCUMENTATION" = "yes"; then