From b11675b71496040ad6e25f1820cea047dd97e86f Mon Sep 17 00:00:00 2001
From: Alessio Treglia <alessio@tendermint.com>
Date: Tue, 7 Jul 2020 17:29:39 +0100
Subject: [PATCH] Makefile: parse COSMOS_BUILD_OPTIONS

Look for build options in the make's COSMOS_BUILD_OPTIONS
variable. This allows one to build simd with ledger support.

References:
* https://github.com/cosmos/gaia/pull/363
* https://github.com/tendermint/tendermint/pull/4738
---
 Makefile | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 62 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 2ca39cdb4da5..7cd1b481713c 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 
 PACKAGES_NOSIMULATION=$(shell go list ./... | grep -v '/simulation')
 PACKAGES_SIMTEST=$(shell go list ./... | grep '/simulation')
-VERSION := $(shell echo $(shell git describe --tags --always) | sed 's/^v//')
+VERSION := $(shell echo $(shell git describe) | sed 's/^v//')
 COMMIT := $(shell git log -1 --format='%H')
 LEDGER_ENABLED ?= true
 BINDIR ?= $(GOPATH)/bin
@@ -14,6 +14,66 @@ DOCKER_BUF := docker run -v $(shell pwd):/workspace --workdir /workspace bufbuil
 
 export GO111MODULE = on
 
+# process build tags
+
+build_tags = netgo
+ifeq ($(LEDGER_ENABLED),true)
+  ifeq ($(OS),Windows_NT)
+    GCCEXE = $(shell where gcc.exe 2> NUL)
+    ifeq ($(GCCEXE),)
+      $(error gcc.exe not installed for ledger support, please install or set LEDGER_ENABLED=false)
+    else
+      build_tags += ledger
+    endif
+  else
+    UNAME_S = $(shell uname -s)
+    ifeq ($(UNAME_S),OpenBSD)
+      $(warning OpenBSD detected, disabling ledger support (https://github.com/cosmos/cosmos-sdk/issues/1988))
+    else
+      GCC = $(shell command -v gcc 2> /dev/null)
+      ifeq ($(GCC),)
+        $(error gcc not installed for ledger support, please install or set LEDGER_ENABLED=false)
+      else
+        build_tags += ledger
+      endif
+    endif
+  endif
+endif
+
+ifeq (cleveldb,$(findstring cleveldb,$(COSMOS_BUILD_OPTIONS)))
+  build_tags += gcc
+endif
+build_tags += $(BUILD_TAGS)
+build_tags := $(strip $(build_tags))
+
+whitespace :=
+whitespace += $(whitespace)
+comma := ,
+build_tags_comma_sep := $(subst $(whitespace),$(comma),$(build_tags))
+
+# process linker flags
+
+ldflags = -X github.com/cosmos/cosmos-sdk/version.Name=sim \
+		  -X github.com/cosmos/cosmos-sdk/version.AppName=simd \
+		  -X github.com/cosmos/cosmos-sdk/version.Version=$(VERSION) \
+		  -X github.com/cosmos/cosmos-sdk/version.Commit=$(COMMIT) \
+		  -X "github.com/cosmos/cosmos-sdk/version.BuildTags=$(build_tags_comma_sep)"
+
+ifeq (cleveldb,$(findstring cleveldb,$(COSMOS_BUILD_OPTIONS)))
+  ldflags += -X github.com/cosmos/cosmos-sdk/types.DBBackend=cleveldb
+endif
+ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))
+  ldflags += -w -s
+endif
+ldflags += $(LDFLAGS)
+ldflags := $(strip $(ldflags))
+
+BUILD_FLAGS := -tags "$(build_tags)" -ldflags '$(ldflags)'
+# check for nostrip option
+ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))
+  BUILD_FLAGS += -trimpath
+endif
+
 all: tools build lint test
 
 # The below include contains the tools and runsim targets.
@@ -212,7 +272,7 @@ benchmark:
 
 lint:
 	golangci-lint run --out-format=tab --issues-exit-code=0
-	find . -name '*.go' -type f -not -path "./vendor*" -not -path "*.git*" | xargs gofmt -d -s
+	find . -name '*.go' -type f -not -path "./vendor*" -not -path "*.git*" -not -name '*.pb.go' | xargs gofmt -d -s
 .PHONY: lint
 
 format: