1 files changed, 163 insertions, 0 deletions
diff --git a/cmake.config/CMakeLists.txt b/cmake.config/CMakeLists.txt
new file mode 100644
index 0000000000..8c86b89e43
--- /dev/null
+++ b/cmake.config/CMakeLists.txt
@@ -0,0 +1,163 @@
+include(CheckTypeSize)
+include(CheckSymbolExists)
+include(CheckFunctionExists)
+include(CheckIncludeFiles)
+include(CheckCSourceRuns)
+include(CheckCSourceCompiles)
+
+check_type_size("int" SIZEOF_INT LANGUAGE C)
+check_type_size("long" SIZEOF_LONG LANGUAGE C)
+check_type_size("intmax_t" SIZEOF_INTMAX_T LANGUAGE C)
+check_type_size("int32_t" SIZEOF_INT32_T LANGUAGE C)
+check_type_size("size_t" SIZEOF_SIZE_T LANGUAGE C)
+check_type_size("long long" SIZEOF_LONG_LONG LANGUAGE C)
+check_type_size("void *" SIZEOF_VOID_PTR LANGUAGE C)
+
+check_symbol_exists(_NSGetEnviron crt_externs.h HAVE__NSGETENVIRON)
+
+# Headers
+check_include_files(langinfo.h HAVE_LANGINFO_H)
+check_include_files(locale.h HAVE_LOCALE_H)
+check_include_files(pwd.h HAVE_PWD_H)
+check_include_files(strings.h HAVE_STRINGS_H)
+check_include_files(sys/wait.h HAVE_SYS_WAIT_H)
+if(NOT HAVE_SYS_WAIT_H AND UNIX)
+  # See if_cscope.c
+  message(SEND_ERROR "header sys/wait.h is required for Unix")
+endif()
+check_include_files(sys/utsname.h HAVE_SYS_UTSNAME_H)
+check_include_files(termios.h HAVE_TERMIOS_H)
+check_include_files(sys/uio.h HAVE_SYS_UIO_H)
+check_include_files(sys/sdt.h HAVE_SYS_SDT_H)
+
+# Functions
+check_function_exists(fseeko HAVE_FSEEKO)
+check_function_exists(getpwent HAVE_GETPWENT)
+check_function_exists(getpwnam HAVE_GETPWNAM)
+check_function_exists(getpwuid HAVE_GETPWUID)
+check_function_exists(readv HAVE_READV)
+
+if(Iconv_FOUND)
+  set(HAVE_ICONV 1)
+endif()
+
+check_function_exists(opendir HAVE_OPENDIR)
+check_function_exists(readlink HAVE_READLINK)
+check_function_exists(setpgid HAVE_SETPGID)
+check_function_exists(setsid HAVE_SETSID)
+check_function_exists(sigaction HAVE_SIGACTION)
+check_function_exists(strnlen HAVE_STRNLEN)
+check_function_exists(strcasecmp HAVE_STRCASECMP)
+check_function_exists(strncasecmp HAVE_STRNCASECMP)
+check_function_exists(strptime HAVE_STRPTIME)
+
+if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
+  check_c_source_compiles("
+#include <termios.h>
+int
+main(void)
+{
+  return forkpty(0, NULL, NULL, NULL);
+}
+" HAVE_FORKPTY)
+else()
+  set(HAVE_FORKPTY 1)
+endif()
+
+# Symbols
+check_symbol_exists(FD_CLOEXEC "fcntl.h" HAVE_FD_CLOEXEC)
+if(HAVE_LANGINFO_H)
+  check_symbol_exists(CODESET "langinfo.h" HAVE_NL_LANGINFO_CODESET)
+endif()
+
+check_include_files("endian.h" HAVE_ENDIAN_H)
+check_include_files("sys/endian.h" HAVE_SYS_ENDIAN_H)
+
+set(ENDIAN_INCLUDE_FILE "endian.h")
+if(HAVE_SYS_ENDIAN_H AND NOT HAVE_ENDIAN_H)
+  set(ENDIAN_INCLUDE_FILE "sys/endian.h")
+endif()
+
+set(SI "#include <stdint.h>\n")
+set(MS "int main(int argc,char**argv)\n{\n  uint64_t i=0x0102030405060708ULL;")
+set(ME "}")
+check_c_source_compiles("
+  #define _BSD_SOURCE 1
+  #define _DEFAULT_SOURCE 1
+  ${SI}
+  #include <${ENDIAN_INCLUDE_FILE}>
+  #ifndef be64toh
+  # error No be64toh macros
+  #endif
+  ${MS}
+    uint64_t j = be64toh(i);
+    return (j == 0);  // j must not be zero
+  ${ME}"
+  HAVE_BE64TOH_MACROS)
+if(NOT "${HAVE_BE64TOH_MACROS}")
+  check_function_exists(be64toh HAVE_BE64TOH_FUNC)
+endif()
+if("${HAVE_BE64TOH_MACROS}" OR "${HAVE_BE64TOH_FUNC}")
+  set(HAVE_BE64TOH 1)
+endif()
+if (NOT "${HAVE_BE64TOH}")
+  if (NOT "${CMAKE_CROSSCOMPILING}")
+    # It is safe to make ORDER_BIG_ENDIAN not defined if
+    # - HAVE_BE64TOH is true. In this case be64toh will be used unconditionally in
+    #   any case and ORDER_BIG_ENDIAN will not be examined.
+    # - CMAKE_CROSSCOMPILING *and* HAVE_BE64TOH are both false. In this case
+    #   be64toh function which uses cycle and arithmetic operations is used which
+    #   will work regardless of endianness. Function is sub-optimal though.
+    check_c_source_runs("
+      ${SI}
+      ${MS}
+        char *s = (char *) &i;
+        return (
+          s[0] == 0x01
+          && s[1] == 0x02
+          && s[2] == 0x03
+          && s[3] == 0x04
+          && s[4] == 0x05
+          && s[5] == 0x06
+          && s[6] == 0x07
+          && s[7] == 0x08) ? 0 : 1;
+      ${ME}"
+      ORDER_BIG_ENDIAN)
+  endif()
+endif()
+
+# generate configuration header and update include directories
+configure_file (
+  "${PROJECT_SOURCE_DIR}/cmake.config/config.h.in"
+  "${PROJECT_BINARY_DIR}/cmake.config/auto/config.h"
+  )
+
+# generate version definitions
+configure_file (
+  "${PROJECT_SOURCE_DIR}/cmake.config/versiondef.h.in"
+  "${PROJECT_BINARY_DIR}/cmake.config/auto/versiondef.h"
+  )
+
+# generate pathdef.c
+find_program(WHOAMI_PROG whoami)
+find_program(HOSTNAME_PROG hostname)
+
+if (DEFINED ENV{USERNAME})
+  set(USERNAME $ENV{USERNAME})
+elseif (NOT DEFINED USERNAME AND EXISTS ${WHOAMI_PROG})
+  execute_process(COMMAND ${WHOAMI_PROG}
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    OUTPUT_VARIABLE USERNAME)
+endif()
+if (DEFINED ENV{HOSTNAME})
+  set(HOSTNAME $ENV{HOSTNAME})
+elseif (EXISTS ${HOSTNAME_PROG})
+  execute_process(COMMAND ${HOSTNAME_PROG}
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    OUTPUT_VARIABLE HOSTNAME)
+endif()
+
+configure_file (
+  "${PROJECT_SOURCE_DIR}/cmake.config/pathdef.c.in"
+  "${PROJECT_BINARY_DIR}/cmake.config/auto/pathdef.c"
+  ESCAPE_QUOTES)