Support building on OpenBSD.

Closes: #11 Co-Authored-By: 3405691582 <[email protected]> GitOrigin-RevId: 19dc23f2d6f3695ac3089739747b67389993042f
jmillikin · Aug 11, 2022 · 167f82d · 167f82d
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diff --git a/bison/internal/gnulib/config-openbsd.h b/bison/internal/gnulib/config-openbsd.h
@@ -0,0 +1,213 @@
+{GNULIB_CONFIG_HEADER}
+
+#define _GL_ATTRIBUTE_FORMAT_PRINTF(x, y)
+
+#define O_BINARY 0
+#define O_TEXT 0
+
+extern char **environ;
+
+/******************************************************************************/
+
+#define CHECK_PRINTF_SAFE 1
+#define C_LOCALE_MAYBE_EILSEQ 1
+#define DBL_EXPBIT0_BIT 20
+#define DBL_EXPBIT0_WORD 1
+#define FLT_EXPBIT0_BIT 23
+#define FLT_EXPBIT0_WORD 0
+#define FUNC_REALPATH_WORKS 1
+#define GETTIMEOFDAY_TIMEZONE struct timezone
+#define GNULIB_CANONICALIZE_LGPL 1
+#define GNULIB_CLOSE_STREAM 1
+#define GNULIB_DIRNAME 1
+#define GNULIB_FD_SAFER_FLAG 1
+#define GNULIB_FOPEN_SAFER 1
+#define GNULIB_FSCANF 1
+#define GNULIB_LOCK 1
+#define GNULIB_MALLOC_GNU 1
+#define GNULIB_MSVC_NOTHROW 1
+#define GNULIB_PIPE2_SAFER 1
+#define GNULIB_SCANF 1
+#define GNULIB_SNPRINTF 1
+#define GNULIB_STRERROR 1
+#define GNULIB_STRERROR_R_POSIX 1
+#define HAVE_ALLOCA 1
+#define HAVE_CALLOC_POSIX 1
+#define HAVE_CANONICALIZE_FILE_NAME 1
+#define HAVE_CATGETS 1
+#define HAVE_CLOCK_GETTIME 1
+#define HAVE_CLOCK_SETTIME 1
+#define HAVE_DECL_ALARM 1
+#define HAVE_DECL_CLEARERR_UNLOCKED 0
+#define HAVE_DECL_FEOF_UNLOCKED 0
+#define HAVE_DECL_FERROR_UNLOCKED 0
+#define HAVE_DECL_FFLUSH_UNLOCKED 0
+#define HAVE_DECL_FGETS_UNLOCKED 1
+#define HAVE_DECL_FPUTC_UNLOCKED 0
+#define HAVE_DECL_FPUTS_UNLOCKED 0
+#define HAVE_DECL_FREAD_UNLOCKED 0
+#define HAVE_DECL_FWRITE_UNLOCKED 0
+#define HAVE_DECL_GETCHAR_UNLOCKED 1
+#define HAVE_DECL_GETC_UNLOCKED 1
+#define HAVE_DECL_GETDTABLESIZE 1
+#define HAVE_DECL_GETHRTIME 0
+#define HAVE_DECL_MBSWIDTH_IN_WCHAR_H 0
+#define HAVE_DECL_OBSTACK_PRINTF 1
+#define HAVE_DECL_PROGRAM_INVOCATION_NAME 0
+#define HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME 0
+#define HAVE_DECL_PUTCHAR_UNLOCKED 1
+#define HAVE_DECL_PUTC_UNLOCKED 1
+#define HAVE_DECL_SETENV 1
+#define HAVE_DECL_SNPRINTF 1
+#define HAVE_DECL_STRDUP 1
+#define HAVE_DECL_STRERROR_R 1
+#define HAVE_DECL_STRNDUP 1
+#define HAVE_DECL_STRNLEN 1
+#define HAVE_DECL_UNSETENV 1
+#define HAVE_DECL_VSNPRINTF 1
+#define HAVE_DECL_WCWIDTH 1
+#define HAVE_DECL__SNPRINTF 0
+#define HAVE_DECL___ARGV 0
+#define HAVE_DUP2 1
+#define HAVE_ENVIRON_DECL 1
+#define HAVE_FCNTL 1
+#define HAVE_FREXPL_IN_LIBC 1
+#define HAVE_FREXP_IN_LIBC 1
+#define HAVE_GETCWD 1
+#define HAVE_GETDTABLESIZE 1
+#define HAVE_GETOPT_H 1
+#define HAVE_GETOPT_LONG_ONLY 1
+#define HAVE_GETRUSAGE 1
+#define HAVE_GETTIMEOFDAY 1
+#define HAVE_INTMAX_T 1
+#define HAVE_INTTYPES_H 1
+#define HAVE_INTTYPES_H_WITH_UINTMAX 1
+#define HAVE_ISASCII 1
+#define HAVE_ISNAND_IN_LIBC 1
+#define HAVE_ISNANF_IN_LIBC 1
+#define HAVE_ISNANL_IN_LIBC 1
+#define HAVE_ISWCNTRL 1
+#define HAVE_LANGINFO_CODESET 1
+#define HAVE_LDEXPL 1
+#define HAVE_LDEXPL_IN_LIBC 1
+#define HAVE_LDEXP_IN_LIBC 1
+#define HAVE_LIMITS_H 1
+#define HAVE_LINK 1
+#define HAVE_LONG_LONG_INT 1
+#define HAVE_LSTAT 1
+#define HAVE_MALLOC_GNU 1
+#define HAVE_MALLOC_POSIX 1
+#define HAVE_MAP_ANONYMOUS 1
+#define HAVE_MATH_H 1
+#define HAVE_MBRTOWC 1
+#define HAVE_MBSINIT 1
+#define HAVE_MBSTATE_T 1
+#define HAVE_MEMORY_H 1
+#define HAVE_MINMAX_IN_SYS_PARAM_H 1
+#define HAVE_MPROTECT 1
+#define HAVE_OBSTACK_PRINTF 1
+#define HAVE_PIPE 1
+#define HAVE_PIPE2 1
+#define HAVE_POSIX_SPAWN 1
+#define HAVE_POSIX_SPAWNATTR_T 1
+#define HAVE_POSIX_SPAWN_FILE_ACTIONS_T 1
+#define HAVE_PTHREAD_MUTEX_RECURSIVE 1
+#define HAVE_PTHREAD_RWLOCK 1
+#define HAVE_RAISE 1
+#define HAVE_RAWMEMCHR 1
+#define HAVE_READLINK 1
+#define HAVE_READLINKAT 1
+#define HAVE_REALLOC_POSIX 1
+#define HAVE_REALPATH 1
+#define HAVE_SEARCH_H 1
+#define HAVE_SETENV 1
+#define HAVE_SIGACTION 1
+#define HAVE_SIGALTSTACK 1
+#define HAVE_SIGINTERRUPT 1
+#define HAVE_SIGSET_T 1
+#define HAVE_SIG_ATOMIC_T 1
+#define HAVE_SNPRINTF 0
+#define HAVE_SNPRINTF_RETVAL_C99 1
+#define HAVE_SPAWN_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_STDINT_H_WITH_UINTMAX 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STPCPY 1
+#define HAVE_STRCHRNUL 1
+#define HAVE_STRDUP 1
+#define HAVE_STRERROR_R 1
+#define HAVE_STRINGS_H 1
+#define HAVE_STRING_H 1
+#define HAVE_STRNDUP 1
+#define HAVE_STRNLEN 1
+#define HAVE_STRUCT_SIGACTION_SA_SIGACTION 1
+#define HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC 1
+#define HAVE_STRUCT_TMS 1
+#define HAVE_STRVERSCMP 1
+#define HAVE_SYMLINK 1
+#define HAVE_SYS_CDEFS_H 1
+#define HAVE_SYS_MMAN_H 1
+#define HAVE_SYS_PARAM_H 1
+#define HAVE_SYS_RESOURCE_H 1
+#define HAVE_SYS_SOCKET_H 1
+#define HAVE_SYS_STAT_H 1
+#define HAVE_SYS_TIMES_H 1
+#define HAVE_SYS_TIME_H 1
+#define HAVE_SYS_TYPES_H 1
+#define HAVE_SYS_WAIT_H 1
+#define HAVE_TOWLOWER 1
+#define HAVE_TSEARCH 1
+#define HAVE_UNISTD_H 1
+#define HAVE_UNSETENV 1
+#define HAVE_UNSIGNED_LONG_LONG_INT 1
+#define HAVE_VAR___PROGNAME 1
+#define HAVE_VSNPRINTF 1
+#define HAVE_WAITID 1
+#define HAVE_WCHAR_H 1
+#define HAVE_WCHAR_T 1
+#define HAVE_WCRTOMB 1
+#define HAVE_WCSLEN 1
+#define HAVE_WCSNLEN 1
+#define HAVE_WCTYPE_H 1
+#define HAVE_WCWIDTH 1
+#define HAVE_WINT_T 1
+#define HAVE_WORKING_O_NOATIME 0
+#define HAVE_WORKING_O_NOFOLLOW 1
+#define HAVE__BOOL 1
+#define HAVE___XPG_STRERROR_R 1
+#define INSTALLPREFIX "/usr/local"
+#define LSTAT_FOLLOWS_SLASHED_SYMLINK 1
+#define MALLOC_0_IS_NONNULL 1
+# define __USE_MINGW_ANSI_STDIO 1
+#define PROMOTED_MODE_T mode_t
+#define REPLACE_FPRINTF_POSIX 1
+#define REPLACE_PRINTF_POSIX 1
+#define REPLACE_VFPRINTF_POSIX 1
+#define STDC_HEADERS 1
+#define TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC 1
+#define USER_LABEL_PREFIX 
+#define USE_POSIX_THREADS 1
+#define USE_POSIX_THREADS_WEAK 1
+# define _ALL_SOURCE 1
+# define _DARWIN_C_SOURCE 1
+# define _GNU_SOURCE 1
+# define _NETBSD_SOURCE 1
+# define _OPENBSD_SOURCE 1
+# define _POSIX_PTHREAD_SEMANTICS 1
+# define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1
+# define __STDC_WANT_IEC_60559_BFP_EXT__ 1
+# define __STDC_WANT_IEC_60559_DFP_EXT__ 1
+# define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1
+# define __STDC_WANT_IEC_60559_TYPES_EXT__ 1
+# define __STDC_WANT_LIB_EXT2__ 1
+# define __STDC_WANT_MATH_SPEC_FUNCS__ 1
+# define _TANDEM_SOURCE 1
+# define _HPUX_ALT_XOPEN_SOCKET_API 1
+# define __EXTENSIONS__ 1
+#define USE_UNLOCKED_IO 0
+#define _DARWIN_USE_64_BIT_INODE 1
+#define _NETBSD_SOURCE 1
+#define _USE_STD_STAT 1
+#define restrict __restrict
+
+{GNULIB_CONFIG_FOOTER}
diff --git a/bison/internal/gnulib/gnulib.BUILD b/bison/internal/gnulib/gnulib.BUILD
@@ -19,6 +19,7 @@ cc_library(
     hdrs = select({
         "@bazel_tools//src/conditions:darwin": glob(["config-darwin/*.h"]),
         "@bazel_tools//src/conditions:windows": glob(["config-windows/*.h"]),
+        "@bazel_tools//src/conditions:openbsd": glob(["config-openbsd/*.h"]),
         "//conditions:default": glob(["config-linux/*.h"]),
     }),
     includes = select({
@@ -28,6 +29,9 @@ cc_library(
         "@bazel_tools//src/conditions:windows": [
             "config-windows",
         ],
+        "@bazel_tools//src/conditions:openbsd": [
+            "config-openbsd",
+        ],
         "//conditions:default": [
             "config-linux",
         ],
@@ -42,6 +46,12 @@ cc_library(
     deps = [":config_h"],
 )
 
+cc_library(
+    name = "stub_alloca_h",
+    hdrs = ["stub-alloca/alloca.h"],
+    includes = ["stub-alloca"],
+)
+
 _GNULIB_HDRS = glob([
     "lib/*.h",
     "lib/bitset/*.h",
@@ -192,6 +202,7 @@ cc_library(
         "//:timevar_def",
     ] + select({
         "@bazel_tools//src/conditions:windows": [":gnulib_windows_shims"],
+        "@bazel_tools//src/conditions:openbsd": [":stub_alloca_h"],
         "//conditions:default": [],
     }),
 )
diff --git a/bison/internal/gnulib/gnulib.bzl b/bison/internal/gnulib/gnulib.bzl
@@ -45,6 +45,7 @@ _CONFIG_FOOTER = """
 #include <stdint.h>
 #include <stdio.h>
 #include <wchar.h>
+#include <stdarg.h>
 
 struct obstack;
 int obstack_printf(struct obstack *obs, const char *format, ...);
@@ -78,6 +79,7 @@ def gnulib_overlay(ctx, bison_version, extra_copts = []):
         ("darwin", ctx.attr._gnulib_config_darwin_h),
         ("linux", ctx.attr._gnulib_config_linux_h),
         ("windows", ctx.attr._gnulib_config_windows_h),
+        ("openbsd", ctx.attr._gnulib_config_openbsd_h),
     ]:
         config_prefix = "gnulib/config-{}/".format(os)
 
@@ -143,6 +145,20 @@ def gnulib_overlay(ctx, bison_version, extra_copts = []):
         "(const char **) environ": "NULL",
     }, executable = False)
 
+    # Some platforms have alloca() but not <alloca.h>.
+    ctx.file("gnulib/stub-alloca/alloca.h", "")
+
+    # Silence warning about unused variable when HAVE_SNPRINTF is defined 0.
+    ctx.template("gnulib/lib/vasnprintf.c", "gnulib/lib/vasnprintf.c", substitutions = {
+        "int flags = dp->flags;": "int flags = dp->flags; (void)flags;",
+    })
+
+    # Silence warning about comparison of `size_t` to `float`.
+    ctx.template("gnulib/lib/hash.c", "gnulib/lib/hash.c", substitutions = {
+        "(SIZE_MAX <= candidate)": "((float)(SIZE_MAX) <= candidate)",
+        "(SIZE_MAX <= new_candidate)": "((float)(SIZE_MAX) <= new_candidate)",
+    })
+
 _WINDOWS_STDLIB_SHIMS = [
     "alloca",
     "errno",

diff --git a/bison/internal/repository.bzl b/bison/internal/repository.bzl
@@ -133,5 +133,9 @@ bison_repository = repository_rule(
             default = "//bison/internal:gnulib/config-windows.h",
             allow_single_file = True,
         ),
+        "_gnulib_config_openbsd_h": attr.label(
+            default = "//bison/internal:gnulib/config-openbsd.h",
+            allow_single_file = True,
+        ),
     },
 )
diff --git a/tests/BUILD b/tests/BUILD
@@ -71,6 +71,10 @@ cc_test(
     name = "bison_test",
     srcs = ["bison_test.cc"],
     data = [":testdata"],
+    linkstatic = select({
+        "@bazel_tools//src/conditions:openbsd": True,
+        "//conditions:default": None,
+    }),
     deps = [
         "@bazel_tools//tools/cpp/runfiles",
         "@com_google_googletest//:gtest",