Description of problem:
The latest upgrade of nss broke compilation with -Werror=strict-prototypes

Version-Release number of selected component (if applicable):


How reproducible:
Deterministic

Steps to Reproduce:
1. dnf install -y gcc nss-devel
2. cat >test.c <<EOF
#include <nss.h>
#include <sechash.h>
#include <pk11func.h>
EOF
3. gcc `pkg-config --cflags nss` -c -Wstrict-prototypes -Werror=strict-prototypes test.c

Actual results:
sh-5.0$ gcc `pkg-config --cflags nss` -c -Wstrict-prototypes -Werror=strict-prototypes test.c
In file included from /usr/include/nss3/pk11func.h:12,
                 from test.c:3:
/usr/include/nss3/pk11pub.h:951:1: error: function declaration isn’t a prototype [-Werror=strict-prototypes]
  951 | int SECMOD_GetSystemFIPSEnabled();
      | ^~~
cc1: some warnings being treated as errors
sh-5.0$ echo $?
1

Expected results:
sh-5.0$ gcc `pkg-config --cflags nss` -c -Wstrict-prototypes -Werror=strict-prototypes test.c
sh-5.0$ echo $?
0

Additional info:
Looks like it was newly added function.
sh-5.0$ grep -RniI SECMOD_GetSystemFIPSEnabled /usr/include/
sh-5.0$ rpm -q nss-devel
nss-devel-3.52.0-2.fc33.x86_64


And simple workaround is to run following command as root

sed -e '/SECMOD_GetSystemFIPSEnabled/s/();/(void);/' -i /usr/include/nss3/pk11pub.h