libsphia@gyp_cflags_fix gyp warnings

$ gyp --depth=. --generator-output=output -f make -D "library=shared_library"
$ make -C output
  CC(target) out/Release/obj.target/str-ends-with/deps/str-ends-with/str-ends-with.o
  LIBTOOL-STATIC out/Release/libstr-ends-with.a
  CC(target) out/Release/obj.target/sphia/src/clear.o
  CC(target) out/Release/obj.target/sphia/src/count.o
  CC(target) out/Release/obj.target/sphia/src/error.o
  CC(target) out/Release/obj.target/sphia/src/free.o
  CC(target) out/Release/obj.target/sphia/src/get.o
  CC(target) out/Release/obj.target/sphia/src/new.o
  CC(target) out/Release/obj.target/sphia/src/purge.o
  CC(target) out/Release/obj.target/sphia/src/rm.o
  CC(target) out/Release/obj.target/sphia/src/set.o
  SOLINK(target) out/Release/libsphia.dylib
  SOLINK(target) out/Release/libsphia.dylib: Finished
  CC(target) out/Release/obj.target/sphia-test/test/clear.o
../test/clear.c:30:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/clear.c:30:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/clear.c:30:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
../test/clear.c:52:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/clear.c:52:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/clear.c:52:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
6 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/count.o
../test/count.c:33:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/count.c:33:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/count.c:33:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
3 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/error.o
../test/error.c:25:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/error.c:25:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/error.c:25:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
3 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/free.o
../test/free.c:35:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/free.c:35:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/free.c:35:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
3 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/get.o
../test/get.c:25:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/get.c:25:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/get.c:25:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
3 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/new.o
../test/new.c:26:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/new.c:26:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/new.c:26:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
../test/new.c:34:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/new.c:34:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/new.c:34:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
6 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/purge.o
../test/purge.c:24:25: warning: multi-character character constant [-Wmultichar]
  sprintf(tmp, "%s/%s", SPHIA_TEST_DB, filename);
                        ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
/usr/include/secure/_stdio.h:47:56: note: expanded from macro 'sprintf'
  __builtin___sprintf_chk (str, 0, __darwin_obsz(str), __VA_ARGS__)
                                                       ^
../test/purge.c:24:25: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
/usr/include/secure/_stdio.h:47:56: note: expanded from macro 'sprintf'
  __builtin___sprintf_chk (str, 0, __darwin_obsz(str), __VA_ARGS__)
                                                       ^
../test/purge.c:24:25: warning: format specifies type 'char *' but the argument has type 'int' [-Wformat]
  sprintf(tmp, "%s/%s", SPHIA_TEST_DB, filename);
                ~~      ^~~~~~~~~~~~~
                %d
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/secure/_stdio.h:47:56: note: expanded from macro 'sprintf'
  __builtin___sprintf_chk (str, 0, __darwin_obsz(str), __VA_ARGS__)
                                                       ^
../test/purge.c:86:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/purge.c:86:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/purge.c:86:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
6 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/rm.o
../test/rm.c:27:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/rm.c:27:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/rm.c:27:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
../test/rm.c:39:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/rm.c:39:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/rm.c:39:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
6 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test/set.o
../test/set.c:28:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/set.c:28:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/set.c:28:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
../test/set.c:44:30: warning: multi-character character constant [-Wmultichar]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/set.c:44:30: warning: character constant too long for its type
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^
../test/set.c:44:30: warning: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *'
      [-Wint-conversion]
  sphia_t *sphia = sphia_new(SPHIA_TEST_DB);
                             ^~~~~~~~~~~~~
<command line>:2:23: note: expanded from here
#define SPHIA_TEST_DB '/tmp/libsphia-test-db'
                      ^~~~~~~~~~~~~~~~~~~~~~~
../include/sphia/new.h:23:24: note: passing argument to parameter here
sphia_new (const char *);
                       ^
6 warnings generated.
  CC(target) out/Release/obj.target/sphia-test/test.o
  LINK(target) out/Release/sphia-test
  LINK(target) out/Release/sphia-test: Finished