Make stdint.h an optional inclusion, in case it's not present in some systems.

Use inttypes.h instead if it exists.

CMakeLists.txt

@@ -80,6 +80,7 @@
 # 2017-03-11 PH turned HEAP_MATCH_RECURSE into a NO-OP for 10.30
 # 2017-04-08 PH added HEAP_LIMIT
 # 2017-06-15 ZH added SUPPORT_JIT_SEALLOC support
+# 2018-06-19 PH added checks for stdint.h and inttypes.h
 
 PROJECT(PCRE2 C)
 
@@ -113,6 +114,18 @@ CHECK_INCLUDE_FILE(sys/types.h  HAVE_SYS_TYPES_H)
 CHECK_INCLUDE_FILE(unistd.h     HAVE_UNISTD_H)
 CHECK_INCLUDE_FILE(windows.h    HAVE_WINDOWS_H)
 
+IF(HAVE_INTTYPES_H)
+  SET(PCRE2_HAVE_INTTYPES_H 1)
+ELSE(HAVE_INTTYPES_H)  
+  SET(PCRE2_HAVE_INTTYPES_H 0)
+ENDIF(HAVE_INTTYPES_H)
+
+IF(HAVE_STDINT_H)
+  SET(PCRE2_HAVE_STDINT_H 1)
+ELSE(HAVE_STDINT_H)
+  SET(PCRE2_HAVE_STDINT_H 0)
+ENDIF(HAVE_STDINT_H)
+
 CHECK_FUNCTION_EXISTS(bcopy     HAVE_BCOPY)
 CHECK_FUNCTION_EXISTS(memmove   HAVE_MEMMOVE)
 CHECK_FUNCTION_EXISTS(strerror  HAVE_STRERROR)

ChangeLog

@@ -70,6 +70,10 @@ failed. All such tests now set 10 000 000 as the upper limit.
 16. Another Windows related patch for pcregrep to ensure that WIN32 is 
 undefiined under Cygwin.
 
+17. Test for the presence of stdint.h and inttypes.h in configure and CMake and 
+include whichever exists (stdint preferred) instead of unconditionally 
+including stdint. This makes life easier for old and non-standard systems.
+
 
 Version 10.31 12-February-2018
 ------------------------------

configure.ac

@@ -435,10 +435,10 @@ to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H,
 but if you do, default values will be taken from config.h for non-boolean
 macros that are not defined on the command line.
 
-Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be defined
+Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be
-(conventionally to 1) for TRUE, and not defined at all for FALSE. All such
+defined (conventionally to 1) for TRUE, and not defined at all for FALSE. All
-macros are listed as a commented #undef in config.h.generic. Macros such as
+such macros are listed as a commented #undef in config.h.generic. Macros such
-MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
+as MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
 surrounded by #ifndef/#endif lines so that the value can be overridden by -D.
 
 PCRE2 uses memmove() if HAVE_MEMMOVE is defined; otherwise it uses bcopy() if
@@ -451,6 +451,11 @@ AC_CHECK_HEADERS(limits.h sys/types.h sys/stat.h dirent.h)
 AC_CHECK_HEADERS([windows.h], [HAVE_WINDOWS_H=1])
 AC_CHECK_HEADERS([sys/wait.h], [HAVE_SYS_WAIT_H=1])
 
+AC_CHECK_HEADERS([stdint.h], [PCRE2_HAVE_STDINT_H=1])
+AC_CHECK_HEADERS([inttypes.h], [PCRE2_HAVE_INTTYPES_H=1])
+AC_SUBST([PCRE2_HAVE_STDINT_H])
+AC_SUBST([PCRE2_HAVE_INTTYPES_H])
+
 # Conditional compilation
 AM_CONDITIONAL(WITH_PCRE2_8, test "x$enable_pcre2_8" = "xyes")
 AM_CONDITIONAL(WITH_PCRE2_16, test "x$enable_pcre2_16" = "xyes")

src/config.h.generic

@@ -18,10 +18,10 @@ to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H,
 but if you do, default values will be taken from config.h for non-boolean
 macros that are not defined on the command line.
 
-Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be defined
+Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be
-(conventionally to 1) for TRUE, and not defined at all for FALSE. All such
+defined (conventionally to 1) for TRUE, and not defined at all for FALSE. All
-macros are listed as a commented #undef in config.h.generic. Macros such as
+such macros are listed as a commented #undef in config.h.generic. Macros such
-MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
+as MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
 surrounded by #ifndef/#endif lines so that the value can be overridden by -D.
 
 PCRE2 uses memmove() if HAVE_MEMMOVE is defined; otherwise it uses bcopy() if

src/config.h.in

@@ -18,10 +18,10 @@ to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H,
 but if you do, default values will be taken from config.h for non-boolean
 macros that are not defined on the command line.
 
-Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be defined
+Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be
-(conventionally to 1) for TRUE, and not defined at all for FALSE. All such
+defined (conventionally to 1) for TRUE, and not defined at all for FALSE. All
-macros are listed as a commented #undef in config.h.generic. Macros such as
+such macros are listed as a commented #undef in config.h.generic. Macros such
-MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
+as MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
 surrounded by #ifndef/#endif lines so that the value can be overridden by -D.
 
 PCRE2 uses memmove() if HAVE_MEMMOVE is defined; otherwise it uses bcopy() if

src/pcre2.h

@@ -46,6 +46,12 @@ POSSIBILITY OF SUCH DAMAGE.
 #define PCRE2_PRERELEASE      -RC1
 #define PCRE2_DATE            2018-02-19
 
+/* For the benefit of systems without stdint.h, an alternative is to use 
+inttypes.h. The existence of these headers is checked by configure or CMake. */
+
+#define PCRE2_HAVE_STDINT_H   1
+#define PCRE2_HAVE_INTTYPES_H 1
+
 /* When an application links to a PCRE DLL in Windows, the symbols that are
 imported have to be identified as such. When building PCRE2, the appropriate
 export setting is defined in pcre2_internal.h, which includes this file. So we
@@ -81,12 +87,18 @@ set, we ensure here that it has no effect. */
 #define PCRE2_CALL_CONVENTION
 #endif
 
-/* Have to include limits.h, stdlib.h and stdint.h to ensure that size_t and
+/* Have to include limits.h, stdlib.h and stdint.h (or inttypes.h) to ensure
-uint8_t, UCHAR_MAX, etc are defined. */
+that size_t and uint8_t, UCHAR_MAX, etc are defined. If the system has neither 
+header, the relevant values must be provided by some other means. */
 
 #include <limits.h>
 #include <stdlib.h>
+
+#if PCRE2_HAVE_STDINT_H
 #include <stdint.h>
+#elif PCRE2_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
 
 /* Allow for C++ users compiling this directly. */
 

src/pcre2.h.generic

@@ -46,6 +46,12 @@ POSSIBILITY OF SUCH DAMAGE.
 #define PCRE2_PRERELEASE      -RC1
 #define PCRE2_DATE            2018-02-19
 
+/* For the benefit of systems without stdint.h, an alternative is to use 
+inttypes.h. The existence of these headers is checked by configure or CMake. */
+
+#define PCRE2_HAVE_STDINT_H   1
+#define PCRE2_HAVE_INTTYPES_H 1
+
 /* When an application links to a PCRE DLL in Windows, the symbols that are
 imported have to be identified as such. When building PCRE2, the appropriate
 export setting is defined in pcre2_internal.h, which includes this file. So we
@@ -81,12 +87,18 @@ set, we ensure here that it has no effect. */
 #define PCRE2_CALL_CONVENTION
 #endif
 
-/* Have to include limits.h, stdlib.h and stdint.h to ensure that size_t and
+/* Have to include limits.h, stdlib.h and stdint.h (or inttypes.h) to ensure
-uint8_t, UCHAR_MAX, etc are defined. */
+that size_t and uint8_t, UCHAR_MAX, etc are defined. If the system has neither 
+header, the relevant values must be provided by some other means. */
 
 #include <limits.h>
 #include <stdlib.h>
+
+#if PCRE2_HAVE_STDINT_H
 #include <stdint.h>
+#elif PCRE2_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
 
 /* Allow for C++ users compiling this directly. */
 

src/pcre2.h.in

@@ -46,6 +46,12 @@ POSSIBILITY OF SUCH DAMAGE.
 #define PCRE2_PRERELEASE      @PCRE2_PRERELEASE@
 #define PCRE2_DATE            @PCRE2_DATE@
 
+/* For the benefit of systems without stdint.h, an alternative is to use 
+inttypes.h. The existence of these headers is checked by configure or CMake. */
+
+#define PCRE2_HAVE_STDINT_H   @PCRE2_HAVE_STDINT_H@
+#define PCRE2_HAVE_INTTYPES_H @PCRE2_HAVE_INTTYPES_H@
+
 /* When an application links to a PCRE DLL in Windows, the symbols that are
 imported have to be identified as such. When building PCRE2, the appropriate
 export setting is defined in pcre2_internal.h, which includes this file. So we
@@ -81,12 +87,18 @@ set, we ensure here that it has no effect. */
 #define PCRE2_CALL_CONVENTION
 #endif
 
-/* Have to include limits.h, stdlib.h and stdint.h to ensure that size_t and
+/* Have to include limits.h, stdlib.h and stdint.h (or inttypes.h) to ensure
-uint8_t, UCHAR_MAX, etc are defined. */
+that size_t and uint8_t, UCHAR_MAX, etc are defined. If the system has neither 
+header, the relevant values must be provided by some other means. */
 
 #include <limits.h>
 #include <stdlib.h>
+
+#if PCRE2_HAVE_STDINT_H
 #include <stdint.h>
+#elif PCRE2_HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
 
 /* Allow for C++ users compiling this directly. */