X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=doc%2FMakefile;h=9da1bfd13db712841688ee52fb15a4c61c1253f8;hb=00bfe8cf57938b74085b61ce385e64176c9dd78f;hp=b1dfa5e6f5a019036eec19a21c3b4ffa6b48fb23;hpb=23a18b1c1462471880998b4c57dba338edd7b423;p=clsql.git

diff --git a/doc/Makefile b/doc/Makefile
index b1dfa5e..9da1bfd 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
@@ -70,6 +70,7 @@ doc: html pdf
 
 .PHONY: check
 check:
+	@echo "Operating system detected: ${OS}"
 	@$(CHECK)
 
 .PHONY: html