add extern C markers to installed headers

Some of the headers have extern C markings already, so add to the
rest of the installed files so users don't have to.

BUG=chromium:878440
TEST=build passes
BRANCH=none

Change-Id: I3edf56ca2235269803049207806a9f7eb4c664f2
Reviewed-on: https://chromium-review.googlesource.com/1201042
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>

9 files changed, 73 insertions, 0 deletions

diff --git a/firmware/include/bmpblk_header.h b/firmware/include/bmpblk_header.h
index a010f071..fec309d8 100644
--- a/firmware/include/bmpblk_header.h
+++ b/firmware/include/bmpblk_header.h
@@ -45,6 +45,10 @@
 #define VBOOT_REFERENCE_BMPBLK_HEADER_H_
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 #define BMPBLOCK_SIGNATURE      "$BMP"
 #define BMPBLOCK_SIGNATURE_SIZE (4)
 
@@ -138,4 +142,8 @@ typedef enum ImageFormat {
 #define RENDER_HWID       "$HWID"
 #define RENDER_HWID_RTOL  "$HWID.rtol"
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* VBOOT_REFERENCE_BMPBLK_HEADER_H_ */
diff --git a/firmware/include/gbb_access.h b/firmware/include/gbb_access.h
index 4842563b..09a88fa0 100644
--- a/firmware/include/gbb_access.h
+++ b/firmware/include/gbb_access.h
@@ -10,6 +10,10 @@
 
 #include "vboot_api.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 struct vb2_context;
 struct VbPublicKey;
 
@@ -47,4 +51,8 @@ VbError_t VbGbbReadRecoveryKey(struct vb2_context *ctx,
  */
 VbError_t VbGbbReadHWID(struct vb2_context *ctx, char *hwid, uint32_t max_size);
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif
diff --git a/firmware/include/gpt.h b/firmware/include/gpt.h
index 45702372..0f27cef5 100644
--- a/firmware/include/gpt.h
+++ b/firmware/include/gpt.h
@@ -11,6 +11,10 @@
 #define VBOOT_REFERENCE_CGPTLIB_GPT_H_
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 /* From the specification */
 #define GPT_HEADER_SIGNATURE_SIZE 8
 #define GPT_HEADER_REVISION 0x00010000
@@ -124,4 +128,8 @@ typedef struct {
 
 #define GPTENTRY_EXPECTED_SIZE 128
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* VBOOT_REFERENCE_CGPTLIB_GPT_H_ */
diff --git a/firmware/include/gpt_misc.h b/firmware/include/gpt_misc.h
index 7c4367b8..b3b062b1 100644
--- a/firmware/include/gpt_misc.h
+++ b/firmware/include/gpt_misc.h
@@ -9,6 +9,10 @@
 #include "gpt.h"
 #include "vboot_api.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 enum {
 	GPT_SUCCESS = 0,
 	GPT_ERROR_NO_VALID_KERNEL,
@@ -209,4 +213,8 @@ void SetEntrySuccessful(GptEntry *e, int successful);
 void SetEntryPriority(GptEntry *e, int priority);
 void SetEntryTries(GptEntry *e, int tries);
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* VBOOT_REFERENCE_CGPT_MISC_H_ */
diff --git a/firmware/include/tpm1_tss_constants.h b/firmware/include/tpm1_tss_constants.h
index 54642ba6..8d92bef2 100644
--- a/firmware/include/tpm1_tss_constants.h
+++ b/firmware/include/tpm1_tss_constants.h
@@ -11,6 +11,10 @@
 
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 #define TPM_MAX_COMMAND_SIZE 4096
 #define TPM_LARGE_ENOUGH_COMMAND_SIZE 256  /* saves space in the firmware */
 #define TPM_PUBEK_SIZE 256
@@ -251,4 +255,8 @@ typedef struct tdTPM_NV_AUTH_POLICY
 #define TPM_ORD_Startup                 ((uint32_t) 0x00000099)
 #define TPM_ORD_TakeOwnership           ((uint32_t) 0x0000000D)
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* ! __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM1_TSS_CONSTANTS_H */
diff --git a/firmware/include/tpm2_marshaling.h b/firmware/include/tpm2_marshaling.h
index 3ebea388..929f0fcd 100644
--- a/firmware/include/tpm2_marshaling.h
+++ b/firmware/include/tpm2_marshaling.h
@@ -8,6 +8,10 @@
 
 #include "tss_constants.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 /* The below functions are used to serialize/deserialize TPM2 commands. */
 
 /**
@@ -86,4 +90,8 @@ void tpm_set_ph_disabled(int flag);
  */
 int tpm_is_ph_disabled(void);
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif // __SRC_LIB_TPM2_MARSHALING_H
diff --git a/firmware/include/tpm2_tss_constants.h b/firmware/include/tpm2_tss_constants.h
index 84ad05b7..4249cf04 100644
--- a/firmware/include/tpm2_tss_constants.h
+++ b/firmware/include/tpm2_tss_constants.h
@@ -10,6 +10,10 @@
 #ifndef __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H
 #define __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 #define TPM_BUFFER_SIZE 256
 
 /* Tpm2 command tags. */
@@ -295,4 +299,8 @@ typedef struct tdTPM_IFX_FIELDUPGRADEINFO
 #define TPM_MAX_COMMAND_SIZE	4096
 #define TPM_PCR_DIGEST		32
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* ! __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H */
diff --git a/firmware/include/vboot_api.h b/firmware/include/vboot_api.h
index 55c3d02a..33b997f8 100644
--- a/firmware/include/vboot_api.h
+++ b/firmware/include/vboot_api.h
@@ -26,6 +26,10 @@
 
 #include "gpt.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 /*****************************************************************************/
 /* Error codes */
 
@@ -985,4 +989,9 @@ uint8_t VbExOverrideGptEntryPriority(const GptEntry *e);
  * @return VBERROR_... error, VBERROR_SUCCESS on success.
  */
 VbError_t VbExGetLocalizationCount(uint32_t *count);
+
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* VBOOT_REFERENCE_VBOOT_API_H_ */
diff --git a/firmware/include/vboot_struct.h b/firmware/include/vboot_struct.h
index c1afd8cd..fc993712 100644
--- a/firmware/include/vboot_struct.h
+++ b/firmware/include/vboot_struct.h
@@ -10,6 +10,10 @@
 #define VBOOT_REFERENCE_VBOOT_STRUCT_H_
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif  /* __cplusplus */
+
 /* Public key data */
 typedef struct VbPublicKey {
 	/* Offset of key data from start of this struct */
@@ -495,4 +499,8 @@ typedef struct VbSharedDataHeader {
 
 #define VB_SHARED_DATA_VERSION 2      /* Version for struct_version */
 
+#ifdef __cplusplus
+}
+#endif  /* __cplusplus */
+
 #endif  /* VBOOT_REFERENCE_VBOOT_STRUCT_H_ */