doc: Update compiler for FreeBSD specific instructions

FreeBSD has since v13 switched to Clang from GCC, so update our
instructions to cc instead of gcc to reflect that.

Reported-by: [email protected]
Discussion: https://postgr.es/m/CAJR80-xzR49jEkAC98Yo-wuSdFDV2=2H4j9Z2AukSVU=-UpynA@mail.gmail.com

diff --git a/doc/src/sgml/dfunc.sgml b/doc/src/sgml/dfunc.sgml
index 7bdf7f607025da44e03aa96b4e372fb44ee5bb41..554f9fac4ce6409c5d7bf44da8d012169facf9ce 100644 (file)
--- a/doc/src/sgml/dfunc.sgml
+++ b/doc/src/sgml/dfunc.sgml
@@ -66,11 +66,12 @@
       -fPIC.  To create shared libraries the compiler
       flag is -shared.
 
-gcc -fPIC -c foo.c
-gcc -shared -o foo.so foo.o
+cc -fPIC -c foo.c
+cc -shared -o foo.so foo.o
 
-      This is applicable as of version 3.0 of
-      FreeBSD.
+      This is applicable as of version 13.0 of
+      FreeBSD, older versions used
+      the gcc compiler.