[flashrom-gerrit] Change in flashrom[master]: tree: Enable -Wwrite-strings

[Nico Huber (Code Review)]

Nico Huber has submitted this change. ( https://review.coreboot.org/c/flashrom/+/34577 )

Change subject: tree: Enable -Wwrite-strings
......................................................................

tree: Enable -Wwrite-strings

When compiling, this warning gives string literals the type const char[]
to help catch accidental modification (which is undefined behaviour).
There currently aren't any instances of this in flashrom, so let's
enable this warning to keep it that way. This requires adding const
qualifiers to the declarations of several variables that work with
string literals.

Change-Id: I62d9bc194938a0c9a0e4cdff7ced8ea2e14cc1bc
Signed-off-by: Jacob Garber 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/34577
Tested-by: build bot (Jenkins) 
Reviewed-by: David Hendricks 
Reviewed-by: Edward O'Callaghan 
---
M Makefile
M buspirate_spi.c
M cli_classic.c
M dmi.c
M meson.build
M pony_spi.c
M util/ich_descriptors_tool/ich_descriptors_tool.c
7 files changed, 8 insertions(+), 7 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  David Hendricks: Looks good to me, approved
  Edward O'Callaghan: Looks good to me, approved

diff --git a/Makefile b/Makefile
index 545e84a..1a20933 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@
 DIFF    = diff
 PREFIX  ?= /usr/local
 MANDIR  ?= $(PREFIX)/share/man
-CFLAGS  ?= -Os -Wall -Wshadow -Wmissing-prototypes
+CFLAGS  ?= -Os -Wall -Wshadow -Wmissing-prototypes -Wwrite-strings
 EXPORTDIR ?= .
 RANLIB  ?= ranlib
 PKG_CONFIG ?= pkg-config
diff --git a/buspirate_spi.c b/buspirate_spi.c
index 08cd04c..826bd84 100644
--- a/buspirate_spi.c
+++ b/buspirate_spi.c
@@ -113,7 +113,7 @@
    return 0;
 }

-static int buspirate_wait_for_string(unsigned char *buf, char *key)
+static int buspirate_wait_for_string(unsigned char *buf, const char *key)
 {
    unsigned int keylen = strlen(key);
    int ret;
diff --git a/cli_classic.c b/cli_classic.c
index d23298e..4844d1d 100644
--- a/cli_classic.c
+++ b/cli_classic.c
@@ -79,7 +79,7 @@
    exit(1);
 }

-static int check_filename(char *filename, char *type)
+static int check_filename(char *filename, const char *type)
 {
    if (!filename || (filename[0] == '\0')) {
    	fprintf(stderr, "Error: No %s file specified.\n", type);
diff --git a/dmi.c b/dmi.c
index 9ec935a..c44221c 100644
--- a/dmi.c
+++ b/dmi.c
@@ -69,7 +69,7 @@
 static const struct {
    uint8_t type;
    uint8_t is_laptop;
-	char *name;
+	const char *name;
 } dmi_chassis_types[] = {
    {0x01, 2, "Other"},
    {0x02, 2, "Unknown"},
diff --git a/meson.build b/meson.build
index e1b6c16..d778d71 100644
--- a/meson.build
+++ b/meson.build
@@ -11,8 +11,9 @@
 lt_age = '0'
 lt_version = '@0@.@1@.@2@'.format(lt_current, lt_age, lt_revision)

-# hide some warnings
+# hide/enable some warnings
 warning_flags = [
+  '-Wwrite-strings',
   '-Wno-unused-parameter',
   '-Wno-sign-compare',
   '-Wno-address-of-packed-member',
diff --git a/pony_spi.c b/pony_spi.c
index 6c03308..ed9d326 100644
--- a/pony_spi.c
+++ b/pony_spi.c
@@ -115,7 +115,7 @@
    int i, data_out;
    char *arg = NULL;
    enum pony_type type = TYPE_SI_PROG;
-	char *name;
+	const char *name;
    int have_device = 0;
    int have_prog = 0;

diff --git a/util/ich_descriptors_tool/ich_descriptors_tool.c b/util/ich_descriptors_tool/ich_descriptors_tool.c
index 2db0f62..6f13749 100644
--- a/util/ich_descriptors_tool/ich_descriptors_tool.c
+++ b/util/ich_descriptors_tool/ich_descriptors_tool.c
@@ -111,7 +111,7 @@
    printf("\n");
 }

-static void usage(char *argv[], char *error)
+static void usage(char *argv[], const char *error)
 {
    if (error != NULL) {
    	fprintf(stderr, "%s\n", error);