X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=doc%2FMakefile;h=0e03e00aef0975e38a6d3a6a6390936d20dc510f;hp=b1dfa5e6f5a019036eec19a21c3b4ffa6b48fb23;hb=cf7d86bff2e462e0d0309da265a7ec39bf52c9a2;hpb=23a18b1c1462471880998b4c57dba338edd7b423

diff --git a/doc/Makefile b/doc/Makefile
index b1dfa5e..0e03e00 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -21,9 +21,9 @@ DOCFILE_EXT_DEFAULT:=xml
 
 # Standard docfile processing
 
-DEBIAN=expr "`cat /etc/issue`" : '.*Debian.*'
-SUSE=expr "`cat /etc/issue`" : '.*SuSE.*'
-REDHAT=expr "`cat /etc/issue`" : '.*RedHat.*'
+DEBIAN=$(shell expr "`cat /etc/issue`" : '.*Debian.*')
+SUSE=$(shell expr "`cat /etc/issue`" : '.*SuSE.*')
+REDHAT=$(shell expr "`cat /etc/issue`" : '.*RedHat.*')
 
 ifneq (${DEBIAN},0)
 OS:=debian