[ccan] [PATCH v3 4/7] configurator: Add output cflag option and macro
Kevin Locke
kevin at kevinlocke.name
Thu Sep 29 10:44:45 AEST 2016
Unfortunately, not all compilers support -o as a command-line option for
specifying the output file. Visual Studio cl.exe issues warning D9035
when -o is given, which is detected as a compile warning by the
configurator.
To support such compilers, add the command-line option -O to
configurator which can be used to specify the cflag for setting the
output executable file name. Additionally define the macro
CCAN_OUTPUT_EXE_CFLAG in config.h and use it when invoking the compiler
(e.g. from ccanlint).
For reference, the name CCAN_OUTPUT_EXE_CFLAG was chosen to avoid
potential name conflicts in the future due to cl.exe requiring different
flags for different types of output[1] (e.g. object files are /Fo:).
1. https://msdn.microsoft.com/en-us/library/f1cb223a.aspx
Signed-off-by: Kevin Locke <kevin at kevinlocke.name>
---
tools/compile.c | 15 ++++++++----
tools/configurator/configurator.c | 50 +++++++++++++++++++++++++++------------
tools/tools.h | 6 +++--
3 files changed, 49 insertions(+), 22 deletions(-)
diff --git a/tools/compile.c b/tools/compile.c
index b88c1d8..e796e3f 100644
--- a/tools/compile.c
+++ b/tools/compile.c
@@ -7,8 +7,12 @@
#ifndef CCAN_CFLAGS
#define CCAN_CFLAGS DEFAULT_CCAN_CFLAGS
#endif
+#ifndef CCAN_OUTPUT_EXE_CFLAG
+#define CCAN_OUTPUT_EXE_CFLAG DEFAULT_CCAN_OUTPUT_EXE_CFLAG
+#endif
const char *compiler = CCAN_COMPILER;
const char *cflags = CCAN_CFLAGS;
+const char *outexecflag = CCAN_OUTPUT_EXE_CFLAG;
bool compile_verbose = false;
@@ -37,8 +41,9 @@ bool compile_object(const void *ctx, const char *cfile, const char *ccandir,
if (compile_verbose)
printf("Compiling %s\n", outfile);
return run_command(ctx, NULL, output,
- "%s %s -I%s -c -o %s %s",
- compiler, cflags, ccandir, outfile, cfile);
+ "%s %s -I%s -c %s%s %s",
+ compiler, cflags, ccandir,
+ outexecflag, outfile, cfile);
}
/* Compile and link single C file, with object files.
@@ -51,7 +56,7 @@ bool compile_and_link(const void *ctx, const char *cfile, const char *ccandir,
if (compile_verbose)
printf("Compiling and linking %s\n", outfile);
return run_command(ctx, NULL, output,
- "%s %s -I%s -o %s %s %s %s",
- compiler, cflags,
- ccandir, outfile, cfile, objs, libs);
+ "%s %s -I%s %s%s %s %s %s",
+ compiler, cflags, ccandir,
+ outexecflag, outfile, cfile, objs, libs);
}
diff --git a/tools/configurator/configurator.c b/tools/configurator/configurator.c
index 73fdc95..4cb84d0 100644
--- a/tools/configurator/configurator.c
+++ b/tools/configurator/configurator.c
@@ -40,6 +40,7 @@
#define DEFAULT_COMPILER "cc"
#define DEFAULT_FLAGS "-g3 -ggdb -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition"
+#define DEFAULT_OUTPUT_EXE_FLAG "-o"
#define OUTPUT_FILE "configurator.out"
#define INPUT_FILE "configuratortest.c"
@@ -465,10 +466,12 @@ static char *run(const char *cmd, int *exitstatus)
return ret;
}
-static char *connect_args(const char *argv[], const char *extra)
+static char *connect_args(const char *argv[], const char *outflag,
+ const char *files)
{
- unsigned int i, len = strlen(extra) + 1;
+ unsigned int i;
char *ret;
+ size_t len = strlen(outflag) + strlen(files) + 1;
for (i = 1; argv[i]; i++)
len += 1 + strlen(argv[i]);
@@ -478,10 +481,12 @@ static char *connect_args(const char *argv[], const char *extra)
for (i = 1; argv[i]; i++) {
strcpy(ret + len, argv[i]);
len += strlen(argv[i]);
- if (argv[i+1])
+ if (argv[i+1] || *outflag)
ret[len++] = ' ';
}
- strcpy(ret + len, extra);
+ strcpy(ret + len, outflag);
+ len += strlen(outflag);
+ strcpy(ret + len, files);
return ret;
}
@@ -650,33 +655,47 @@ int main(int argc, const char *argv[])
unsigned int i;
const char *default_args[]
= { "", DEFAULT_COMPILER, DEFAULT_FLAGS, NULL };
+ const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
if (argc > 0)
progname = argv[0];
- if (argc > 1) {
+ while (argc > 1) {
if (strcmp(argv[1], "--help") == 0) {
- printf("Usage: configurator [-v] [<compiler> <flags>...]\n"
- " <compiler> <flags> will have \"-o <outfile> <infile.c>\" appended\n"
- "Default: %s %s\n",
- DEFAULT_COMPILER, DEFAULT_FLAGS);
+ printf("Usage: configurator [-v] [-O<outflag>] [<compiler> <flags>...]\n"
+ " <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
+ "Default: %s %s %s\n",
+ DEFAULT_COMPILER, DEFAULT_FLAGS,
+ DEFAULT_OUTPUT_EXE_FLAG);
exit(0);
}
- if (strcmp(argv[1], "-v") == 0) {
+ if (strncmp(argv[1], "-O", 2) == 0) {
argc--;
argv++;
- verbose = 1;
+ outflag = argv[1] + 2;
+ if (!*outflag) {
+ fprintf(stderr,
+ "%s: option requires an argument -- O\n",
+ argv[0]);
+ exit(1);
+ }
+ } else if (strcmp(argv[1], "-v") == 0) {
+ argc--;
+ argv++;
+ verbose++;
} else if (strcmp(argv[1], "-vv") == 0) {
argc--;
argv++;
- verbose = 2;
+ verbose += 2;
+ } else {
+ break;
}
}
if (argc == 1)
argv = default_args;
- cmd = connect_args(argv, " -o " OUTPUT_FILE " " INPUT_FILE);
+ cmd = connect_args(argv, outflag, OUTPUT_FILE " " INPUT_FILE);
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
run_test(cmd, &tests[i]);
free(cmd);
@@ -691,9 +710,10 @@ int main(int argc, const char *argv[])
printf("#define _GNU_SOURCE /* Always use GNU extensions. */\n");
printf("#endif\n");
printf("#define CCAN_COMPILER \"%s\"\n", argv[1]);
- cmd = connect_args(argv+1, "");
- printf("#define CCAN_CFLAGS \"%s\"\n\n", cmd);
+ cmd = connect_args(argv + 1, "", "");
+ printf("#define CCAN_CFLAGS \"%s\"\n", cmd);
free(cmd);
+ printf("#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
/* This one implies "#include <ccan/..." works, eg. for tdb2.h */
printf("#define HAVE_CCAN 1\n");
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
diff --git a/tools/tools.h b/tools/tools.h
index 3b5c4be..668c91a 100644
--- a/tools/tools.h
+++ b/tools/tools.h
@@ -11,6 +11,7 @@
/* These are the defaults. */
#define DEFAULT_CCAN_COMPILER "cc"
#define DEFAULT_CCAN_CFLAGS "-g"
+#define DEFAULT_CCAN_OUTPUT_EXE_CFLAG "-o"
#define IDENT_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
"abcdefghijklmnopqrstuvwxyz" \
@@ -20,8 +21,9 @@
#define COVERAGE_CFLAGS "-fprofile-arcs -ftest-coverage"
-/* Actual compiler and cflags (defaults to CCAN_COMPILER and CCAN_CFLAGS). */
-extern const char *compiler, *cflags;
+/* Actual compiler and cflags
+ * (defaults to CCAN_COMPILER, CCAN_CFLAGS, CCAN_OUTPUT_EXE_CFLAG). */
+extern const char *compiler, *cflags, *outexecflag;
/* This compiles up the _info file into a temporary. */
char *compile_info(const void *ctx, const char *dir);
--
2.9.3
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