[Bug 1853148] Re: mingw compiler problem with printf/scanf formats

[Andrew Johnson via Core-talk <core-talk@aps.anl.gov>]

We've been seeing this warning for a long time but haven't known about a
fix for it. From the links you posted it would appear that adding the
flag -D__USE_MINGW_ANSI_STDIO to OP_SYS_CPPFLAGS in
configure/os/CONFIG.Common.win32-x86-mingw might solve it (for 64-bit
builds as well), although when I just tried that it doesn't seem to
silence the warnings:

/usr/bin/x86_64-w64-mingw32-g++           -DUSE_TYPED_RSET -I../../pdbApp -I../../p2pApp -I../../common -DNOMINMAX   -D_MINGW -D__USE_MINGW_ANSI_STDIO     -O3   -Wall      -m64    -DEPICS_BUILD_DLL -DEPICS_CALL_DLL   -I. -I../O.Common -I. -I. -I.. -I/local/anj/base-7.0/include/compiler/gcc -I/local/anj/base-7.0/include/os/WIN32 -I/local/anj/base-7.0/include -I/local/anj/base-7.0/include/compiler/gcc -I/local/anj/base-7.0/include/os/WIN32 -I/local/anj/base-7.0/include        -o testpdb.obj -c ../testpdb.cpp
../testpdb.cpp: In function 'int main(int, char**)':
../testpdb.cpp:310:99: warning: unknown conversion type character 'z' in format [-Wformat=]
             testDiag("Cnt %s = %zu (%ld)", it->first.c_str(), it->second.current, it->second.delta);
                                                                                                   ^
../testpdb.cpp:310:99: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t {aka long long unsigned int}' [-Wformat=]
../testpdb.cpp:310:99: warning: too many arguments for format [-Wformat-extra-args]
../testpdb.cpp:348:99: warning: unknown conversion type character 'z' in format [-Wformat=]
             testDiag("Cnt %s = %zu (%ld)", it->first.c_str(), it->second.current, it->second.delta);
                                                                                                   ^
../testpdb.cpp:348:99: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t {aka long long unsigned int}' [-Wformat=]
../testpdb.cpp:348:99: warning: too many arguments for format [-Wformat-extra-args]


My gcc cross-compiler is from RHEL-7, so maybe it might still help with a newer gcc/MinGW version:

tux% x86_64-w64-mingw32-g++ --version
x86_64-w64-mingw32-g++ (GCC) 4.9.3 20150626 (Fedora MinGW 4.9.3-1.el7)

If someone sees that it does help on newer versions I can add that flag
to 3.15.


** Changed in: epics-base
       Status: New => Triaged

** Changed in: epics-base
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1853148

Title:
  mingw compiler problem with printf/scanf formats

Status in EPICS Base:
  Triaged

Bug description:
  ../db/dbJLink.c: In function ‘dbjl_integer’:
  ../db/dbJLink.c:136:16: warning: unknown conversion type character ‘l’ in format [-Wformat=]
           printf("dbjl_integer(%s@%p, %lld)\n",
                  ^
  ../db/dbJLink.c:136:16: warning: too many arguments for format [-Wformat-extra-args]

  
  It seems that mingw does not like "%lld".

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