Use -std=c99 for C compiler on Lnux

PocoDoc/PocoDoc.ini

@@ -0,0 +1,10 @@
+
+PocoBuild=Z:\git\poco-1.9.1
+PocoBase=Z:\git\poco-1.9.1
+PocoDoc.output=releases/poco-1.9.1-all-doc
+PocoDoc.version=1.9.1-all
+
+Includes=-IC:/3rd/PostgreSQL/postgresql-10.5-1-win32/pgsql/include,-IC:/3rd/MySQL/mysql-5.7.23-win32/include,-ICppParser/include,-ICppUnit/include,-ICrypto/include,-IEncodings/include,-IData/include,-IData/include,-IData/MySQL/include,-IData/ODBC/include,-IData/PostgreSQL/include,-IData/SQLite/include, -IData/SQLite/src,-IFoundation/include,-IJSON/include,-IMongoDB/include,-INet/include,-INetSSL_OpenSSL/include,-INetSSL_Win/include,-IRedis/include,-IUtil/include,-IXML/include,-IZip/include,-ISevenZip/include,-IPDF/include
+VCH=C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726
+WDK=C:/Program Files (x86)/Windows Kits/10/Include/10.0.17134.0
+CLP=C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726/bin/Hostx86/x86

build.gradle

@@ -653,7 +653,7 @@ subprojects {
 					cCompiler.define "POCO_HAVE_FD_EPOLL"
 					cCompiler.define "POCO_HAVE_ADDRINFO"
 					cCompiler.define "POCO_HAVE_LIBRESOLV"
-					cCompiler.args "-std=c++11"
+					cCompiler.args 	"-std=c99"
 
 					cppCompiler.define "_XOPEN_SOURCE=600"
 					cppCompiler.define "_REENTRANT"
@@ -665,9 +665,7 @@ subprojects {
 					cppCompiler.define "POCO_HAVE_LIBRESOLV"
 					cppCompiler.args "-std=c++11"
 
-					linker.args "-lrt"
-					linker.args "-ldl"
-					linker.args "-lpthread"
+					linker.args 	("-lrt", "-ldl", "-lpthread")
 				} else
 				if (toolChain in Clang) {			// supposed to be for Darwin OSX
 					cCompiler.define "POCO_HAVE_IPv6"
@@ -691,8 +689,7 @@ subprojects {
 						cppCompiler.args 	'-O2'
 					}
 					
-					linker.args "-stdlib=libc++"
-					linker.args "-ldl"
+					linker.args 	("-stdlib=libc++", "-ldl")
 				}
 			}
 			withType(SharedLibraryBinarySpec) {