I've completed a qmail installation few days ago on a fresh installed Debian Squeeze 64 bit server. All is configured and works fine, except qmailadmin and vqadmin.
As the mail server was missing any kind of web mail administration panel, I needed to make at least one of the two above to make with qmail.
I decided to concentrate on qmailadmin and took the time to make it work. I used the following command lines and got the compile failure during make compilation:
debian:/usr/local/src/qmailadmin-1.2.15# ./configure --enable-cgibindir=/usr/lib/cgi-bin --enable-htmldir=/var/www/qmailadmin/ --enable-modify-quota
The source make failed with the following error:
In file included from template.c:45:
qmailadmin.h:37:1: warning: "MAX_FILE_NAME" redefined
In file included from template.c:28:
/home/vpopmail/include/vpopmail.h:146:1: warning: this is the location of the previous definition
template.c: In function "send_template_now":
template.c:505: error: "VERSION" undeclared (first use in this function)
template.c:505: error: (Each undeclared identifier is reported only once
template.c:505: error: for each function it appears in.)
make: *** [template.o] Error 1
make: Leaving directory `/usr/local/src/qmailadmin-1.2.15'
make: *** [all] Error 2
To workaround these compile issues, I've had to modify the C source file belonging to qmailadmin ( template.c ), e.g.:
debian:/usr/local/src/qmailadmin-1.2.15# vim template.c
In the file I had to add besides the line:
#define VERSION ""
Aterwards qmailadmin's compile and install via make && make install-strip succeeded and now works perfectly fine